Reinsurance Group of America (RGA) 10-Q 5 Aug 15 2015 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2015	Jul. 31, 2015
Document And Entitiy Information [Abstract]
Document Type	10-Q
Document period end date	Jun. 30, 2015
Amendment flag	false
Entity registrant name	REINSURANCE GROUP OF AMERICA INC
Entity central index key	898,174
Entity current reporting status	Yes
Entity voluntary filers	No
Current fiscal year end date	--12-31
Entity filer category	Large Accelerated Filer
Entity well-known seasoned issuer	Yes
Common Shares Outstanding		66,467,879
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q2

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Fixed maturity securities:
Available-for-sale at fair value (amortized cost of $26,305,332 and $23,105,597)	$ 28,063,975	$ 25,480,972
Mortgage loans on real estate (net of allowances of $5,942 and $6,471)	3,073,313	2,712,238
Policy loans	1,438,156	1,284,284
Funds withheld at interest	5,840,076	5,922,561
Short-term investments	76,118	97,694
Other invested assets	1,110,107	1,198,319
Total investments	39,601,745	36,696,068
Cash and cash equivalents	1,335,661	1,645,669
Accrued investment income	322,069	261,096
Premiums receivable and other reinsurance balances	1,518,208	1,527,729
Reinsurance ceded receivables	711,463	578,206
Deferred policy acquisition costs	3,299,541	3,342,575
Other assets	671,584	628,268
Total assets	47,460,271	44,679,611
Liabilities and Stockholders’ Equity
Future policy benefits	16,773,035	14,476,637
Interest-sensitive contract liabilities	13,516,059	12,591,497
Other policy claims and benefits	3,857,610	3,824,069
Other reinsurance balances	311,388	306,915
Deferred income taxes	2,246,086	2,365,817
Other liabilities	1,032,980	994,230
Long-term debt	2,313,470	2,314,293
Collateral finance and securitization notes	926,410	782,701
Total liabilities	$ 40,977,038	$ 37,656,159
Commitments and contingent liabilities (See Note 8)
Stockholders’ Equity:
Preferred stock - par value $.01 per share, 10,000,000 shares authorized, no shares issued or outstanding	$ 0	$ 0
Common stock - par value $.01 per share, 140,000,000 shares authorized, 79,137,758 shares issued at June 30, 2015 and December 31, 2014	791	791
Additional paid-in-capital	1,805,858	1,798,279
Retained earnings	4,425,302	4,239,647
Treasury stock, at cost - 12,716,098 and 10,364,797 shares	(898,082)	(672,394)
Accumulated other comprehensive income	1,149,364	1,657,129
Total stockholders’ equity	6,483,233	7,023,452
Total liabilities and stockholders’ equity	$ 47,460,271	$ 44,679,611

CONDENSED CONSOLIDATED BALANCE3

CONDENSED CONSOLIDATED BALANCE SHEETS PARENTHETICAL - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Available for Sale at Fair value - Amortized cost	$ 26,305,332	$ 23,105,597
Preferred stock par value (per share)	$ 0.01	$ 0.01
Preferred stock shares authorized	10,000,000	10,000,000
Preferred Stock, Shares Issued	0	0
Preferred Stock, Shares Outstanding	0	0
Common stock par value (per share)	$ 0.01	$ 0.01
Common stock shares authorized	140,000,000	140,000,000
Common stock shares issued	79,137,758	79,137,758
Common stock shares outstanding	66,438,559	68,772,961
Treasury stock, shares	12,699,199	10,364,797
Allowances for Loan and Lease Losses, Real Estate	$ 5,942	$ 6,471

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenues:
Net premiums	$ 2,129,043	$ 2,183,160	$ 4,152,895	$ 4,283,797
Investment income, net of related expenses	450,539	410,607	877,430	814,982
Investment related gains (losses), net:
Other-than-temporary impairments on fixed maturity securities	(4,137)	(870)	(6,664)	(1,173)
Other investment related gains (losses), net	(12,041)	119,397	(1,931)	204,271
Total investment related gains (losses), net	(16,178)	118,527	(8,595)	203,098
Other revenues	66,936	120,726	129,223	188,316
Total revenues	2,630,340	2,833,020	5,150,953	5,490,193
Benefits and Expenses:
Claims and other policy benefits	1,866,183	1,841,885	3,641,634	3,685,562
Interest credited	77,246	115,962	197,924	226,556
Policy acquisition costs and other insurance expenses	300,412	409,374	577,455	764,247
Other operating expenses	131,600	127,462	253,218	238,398
Interest expense	35,851	35,211	71,478	70,295
Collateral finance and securitization expense	5,258	2,591	11,329	5,160
Total benefits and expenses	2,416,550	2,532,485	4,753,038	4,990,218
Income before income taxes	213,790	300,535	397,915	499,975
Provision for income taxes	83,399	102,239	142,410	165,015
Net income	$ 130,391	$ 198,296	$ 255,505	$ 334,960
Earnings per share:
Basic earnings per share	$ 1.97	$ 2.87	$ 3.80	$ 4.80
Diluted earnings per share	1.94	2.84	3.76	4.75
Dividends declared per share	$ 0.33	$ 0.30	$ 0.66	$ 0.60

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Comprehensive income (loss)
Net income	$ 130,391	$ 198,296	$ 255,505	$ 334,960
Other comprehensive income (loss), net of tax:
Change in foreign currency translation adjustments	21,935	42,643	(95,836)	(40)
Change in net unrealized gains and losses on investments	(757,641)	304,997	(413,717)	620,381
Change in other-than-temporary impairment losses on fixed maturity securities	0	1,248	0	1,698
Changes in pension and other postretirement plan adjustments	834	273	1,788	1,014
Total other comprehensive income (loss), net of tax	(734,872)	349,161	(507,765)	623,053
Total comprehensive income (loss)	$ (604,481)	$ 547,457	$ (252,260)	$ 958,013

CONDENSED CONSOLIDATED STATEME6

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash Flows from Operating Activities:
Net income	$ 255,505	$ 334,960
Change in operating assets and liabilities, net of acquisition:
Accrued investment income	(26,656)	(9,588)
Premiums receivable and other reinsurance balances	(19,683)	(104,002)
Deferred policy acquisition costs	5,136	165,257
Reinsurance ceded receivable balances	(115,355)	(27,310)
Future policy benefits, other policy claims and benefits, and other reinsurance balances	353,946	581,812
Deferred income taxes	77,047	111,735
Other assets and other liabilities, net	42,363	34,577
Amortization of net investment premiums, discounts and other	(39,021)	(51,521)
Investment related gains, net	8,595	(203,098)
Excess tax benefits from share-based payment arrangement	0	(1,268)
Other, net	63,815	76,256
Net cash provided by operating activities	605,692	907,810
Cash Flows from Investing Activities:
Sales of fixed maturity securities available-for-sale	2,742,814	2,756,942
Maturities of fixed maturity securities available-for-sale	232,712	239,279
Principal payments on mortgage loans on real estate	166,583	200,601
Principal payments on policy loans	441	46,747
Purchases of fixed maturity securities available-for-sale	(2,806,351)	(3,302,047)
Cash invested in mortgage loans on real estate	(531,317)	(266,002)
Cash invested in policy loans	(686)	(52,913)
Cash invested in funds withheld at interest	(57,708)	(39,856)
Payments to Acquire Businesses, Net of Cash Acquired	191,450	0
Payments to Acquire Property, Plant, and Equipment	(22,944)	(43,295)
Increase (Decrease) in Payables under Repurchase Agreements	(101,203)	0
Change in short-term investments	22,543	93,798
Change in other invested assets	73,529	271,373
Net cash used in investing activities	(473,037)	(95,373)
Cash Flows from Financing Activities:
Dividends to stockholders	(44,519)	(41,955)
Proceeds from (Repayments of) Secured Debt	(17,632)	0
Repayments of Short-term Debt	0	(110,000)
Proceeds from Issuance of Secured Debt	160,060	0
Payments of Debt Issuance Costs	(1,170)	0
Repayments of Long-term Debt	(1,178)	0
Purchases of treasury stock	(262,515)	(179,592)
Excess tax benefits from share-based payment arrangement	0	1,268
Exercise of stock options, net	12,641	9,578
Change in cash collateral for derivative positions and other arrangements	(31,244)	47,561
Deposits on universal life and other investment type policies and contracts	132,679	51,257
Withdrawals on universal life and other investment type policies and contracts	(363,600)	(374,567)
Net cash used in financing activities	(416,478)	(376,450)
Effect of exchange rate changes on cash	(26,185)	18,483
Change in cash and cash equivalents	(310,008)	454,470
Cash and cash equivalents, beginning of period	1,645,669	923,647
Cash and cash equivalents, end of period	1,335,661	1,378,117
Supplemental disclosures of cash flow information:
Interest Paid	74,637	67,258
Income Taxes Paid, Net	(19,307)	26,732
Transfer to Investments	118	1,580,080
Capital Expenditures Incurred but Not yet Paid	2,121	0
Noncash or Part Noncash Acquisition, Value of Assets Acquired	3,681,699	0
Noncash or Part Noncash Acquisition, Value of Liabilities Assumed	(3,490,249)	$ 0
Payments to Acquire Businesses, Gross	191,450
Cash Acquired from Acquisition	$ 19,377

Business and Basis of Presentat

Business and Basis of Presentation	6 Months Ended
	Jun. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Basis of Presentation	Business and Basis of Presentation Reinsurance Group of America, Incorporated (“RGA”) is an insurance holding company that was formed on December 31, 1992. The accompanying unaudited condensed consolidated financial statements of RGA and its subsidiaries (collectively, the “Company”) have been prepared in conformity with accounting principles generally accepted in the United States of America for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, these condensed consolidated financial statements do not include all of the information and footnotes required by accounting principles generally accepted in the United States of America for complete financial statements. In the opinion of management, all adjustments, including normal recurring adjustments necessary for a fair presentation have been included. Results for the six months ended June 30, 2015 are not necessarily indicative of the results that may be expected for the year ending December 31, 2015 . There were no subsequent events that would require disclosure or adjustments to the accompanying condensed consolidated financial statements through the date the financial statements were issued. These unaudited condensed consolidated financial statements include the accounts of RGA and its subsidiaries, and all intercompany accounts and transactions have been eliminated. These condensed consolidated statements should be read in conjunction with the Company’s 2014 Annual Report on Form 10-K filed with the Securities and Exchange Commission (“SEC”) on March 2, 2015 (the "2014 Annual Report"). Effective January 1, 2015, the Company further refined its reporting of the Canada; Europe, Middle East and Africa; and Asia Pacific segments into traditional and non-traditional businesses to reflect the expanded product offerings within its geographic-based segments. The prior period presentation has been adjusted to conform to the new segment reporting structure. See Part II, Item 5 - Other Information of this report for comparable figures by quarter for 2014 and 2013.

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2015
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share The following table sets forth the computation of basic and diluted earnings per share on net income (in thousands, except per share information): Three months ended June 30, Six months ended June 30, 2015 2014 2015 2014 Earnings: Net income (numerator for basic and diluted calculations) $ 130,391 $ 198,296 $ 255,505 $ 334,960 Shares: Weighted average outstanding shares (denominator for basic calculation) 66,351 69,076 67,246 69,823 Equivalent shares from outstanding stock options 769 642 785 666 Denominator for diluted calculation 67,120 69,718 68,031 70,489 Earnings per share: Basic $ 1.97 $ 2.87 $ 3.80 $ 4.80 Diluted $ 1.94 $ 2.84 $ 3.76 $ 4.75 The calculation of common equivalent shares does not include the impact of options having a strike or conversion price that exceeds the average stock price for the earnings period, as the result would be antidilutive. The calculation of common equivalent shares also excludes the impact of outstanding performance contingent shares, as the conditions necessary for their issuance have not been satisfied as of the end of the reporting period. For the three months ended June 30, 2015 , no stock options and approximately 0.7 million performance contingent shares were excluded from the calculation. For the three months ended June 30, 2014 , approximately 0.3 million stock options and approximately 0.8 million performance contingent shares were excluded from the calculation. Year-to-date amounts for equivalent shares from outstanding stock options and performance contingent shares are the weighted average of the individual quarterly amounts.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	6 Months Ended
	Jun. 30, 2015
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income The balance of and changes in each component of accumulated other comprehensive income (loss) (“AOCI”) for the six months ended June 30, 2015 and 2014 are as follows (dollars in thousands): Accumulated Other Comprehensive Income (Loss), Net of Income Tax Accumulated Currency Translation Adjustments Unrealized Appreciation (Depreciation) of Investments (1) Pension and Postretirement Benefits Total Balance, December 31, 2014 $ 81,847 $ 1,624,773 $ (49,491 ) $ 1,657,129 Other comprehensive income (loss) before reclassifications (89,220 ) (612,314 ) 733 (700,801 ) Deferred income tax benefit (expense) (6,616 ) 204,252 (222 ) 197,414 Other comprehensive income (loss) before reclassifications, net of income tax (95,836 ) (408,062 ) 511 (503,387 ) Amounts reclassified to (from) AOCI — (6,192 ) 1,965 (4,227 ) Deferred income tax benefit (expense) — 537 (688 ) (151 ) Amounts reclassified to (from) AOCI, net of income tax — (5,655 ) 1,277 (4,378 ) Balance, June 30, 2015 $ (13,989 ) $ 1,211,056 $ (47,703 ) $ 1,149,364 Accumulated Other Comprehensive Income (Loss), Net of Income Tax Accumulated Currency Translation Adjustments Unrealized Appreciation (Depreciation) of Investments (1) Pension and Postretirement Benefits Total Balance, December 31, 2013 $ 207,083 $ 820,245 $ (21,721 ) $ 1,005,607 Other comprehensive income (loss) before reclassifications (9,162 ) 949,650 (257 ) 940,231 Deferred income tax benefit (expense) 9,122 (302,873 ) 251 (293,500 ) Other comprehensive income (loss) before reclassifications, net of income tax (40 ) 646,777 (6 ) 646,731 Amounts reclassified to (from) AOCI — (37,661 ) 1,570 (36,091 ) Deferred income tax benefit (expense) — 12,963 (550 ) 12,413 Amounts reclassified to (from) AOCI, net of income tax — (24,698 ) 1,020 (23,678 ) Balance, June 30, 2014 $ 207,043 $ 1,442,324 $ (20,707 ) $ 1,628,660 (1) Includes cash flow hedges. See Note 5 - “Derivative Instruments” for additional information on cash flow hedges. The following table presents the amounts of AOCI reclassifications for the three and six months ended June 30, 2015 and 2014 (dollars in thousands): Amount Reclassified from AOCI Three months ended June 30, Six months ended June 30, Details about AOCI Components 2015 2014 2015 2014 Affected Line Item in Statement of Income Unrealized gains and losses on available-for-sale securities $ 1,829 $ 27,142 $ 4,908 $ 28,331 Investment related gains (losses), net Gains and losses on cash flow hedges 543 321 603 539 Investment income Gains and losses on cash flow hedges 1,495 — 655 — Investment related gains (losses), net Deferred policy acquisition costs attributed to unrealized gains and losses (1) (4,307 ) 4,370 26 8,791 Total (440 ) 31,833 6,192 37,661 Provision for income taxes (245 ) (11,059 ) (537 ) (12,963 ) Net unrealized gains (losses), net of tax $ (685 ) $ 20,774 $ 5,655 $ 24,698 Amortization of unrealized pension and postretirement benefits: Prior service cost (2) $ (80 ) $ (216 ) $ (163 ) $ (218 ) Actuarial gains/(losses) (2) (1,098 ) (462 ) (1,802 ) (1,352 ) Total (1,178 ) (678 ) (1,965 ) (1,570 ) Provision for income taxes 413 238 688 550 Amortization of unrealized pension and postretirement benefits, net of tax $ (765 ) $ (440 ) $ (1,277 ) $ (1,020 ) Total reclassifications, net of tax $ (1,450 ) $ 20,334 $ 4,378 $ 23,678 (1) This AOCI component is included in the computation of the deferred policy acquisition cost. See Note 8 – “Deferred Policy Acquisition Costs” of the 2014 Annual Report for additional details. (2) These AOCI components are included in the computation of the net periodic pension cost. See Note 10 – “Employee Benefit Plans” for additional details

Investments

Investments	6 Months Ended
	Jun. 30, 2015
Investments [Abstract]
Investments	Investments Fixed Maturity and Equity Securities Available-for-Sale The following tables provide information relating to investments in fixed maturity and equity securities by sector as of June 30, 2015 and December 31, 2014 (dollars in thousands): June 30, 2015: Amortized Unrealized Unrealized Estimated Fair % of Other-than- Cost Gains Losses Value Total in AOCI Available-for-sale: Corporate securities $ 16,000,887 $ 730,409 $ 241,890 $ 16,489,406 58.8 % $ — Canadian and Canadian provincial governments 2,655,763 1,140,904 2,860 3,793,807 13.5 — Residential mortgage-backed securities 1,154,732 47,241 11,094 1,190,879 4.2 (300 ) Asset-backed securities 1,051,093 19,915 8,384 1,062,624 3.8 354 Commercial mortgage-backed securities 1,471,419 63,699 9,649 1,525,469 5.4 (1,609 ) U.S. government and agencies 1,332,518 18,149 86,669 1,263,998 4.5 — State and political subdivisions 478,262 38,891 10,981 506,172 1.8 — Other foreign government, supranational and foreign government-sponsored enterprises 2,160,658 88,674 17,712 2,231,620 8.0 — Total fixed maturity securities $ 26,305,332 $ 2,147,882 $ 389,239 $ 28,063,975 100.0 % $ (1,555 ) Non-redeemable preferred stock $ 91,717 $ 2,477 $ 3,620 $ 90,574 70.9 % Other equity securities 37,642 434 982 37,094 29.1 Total equity securities $ 129,359 $ 2,911 $ 4,602 $ 127,668 100.0 % December 31, 2014: Amortized Unrealized Unrealized Estimated Fair % of Other-than- Cost Gains Losses Value Total in AOCI Available-for-sale: Corporate securities $ 14,010,604 $ 965,523 $ 90,544 $ 14,885,583 58.4 % $ — Canadian and Canadian provincial governments 2,668,852 1,196,420 7 3,865,265 15.2 — Residential mortgage-backed securities 991,867 52,640 6,611 1,037,896 4.1 (300 ) Asset-backed securities 1,059,660 20,301 10,375 1,069,586 4.2 354 Commercial mortgage-backed securities 1,453,657 87,593 8,659 1,532,591 6.0 (1,609 ) U.S. government and agencies 501,352 25,014 515 525,851 2.0 — State and political subdivisions 378,457 51,117 3,498 426,076 1.7 — Other foreign government, supranational and foreign government-sponsored enterprises 2,041,148 110,065 13,089 2,138,124 8.4 — Total fixed maturity securities $ 23,105,597 $ 2,508,673 $ 133,298 $ 25,480,972 100.0 % $ (1,555 ) Non-redeemable preferred stock $ 93,540 $ 7,350 $ 1,527 $ 99,363 78.3 % Other equity securities 26,994 597 94 27,497 21.7 Total equity securities $ 120,534 $ 7,947 $ 1,621 $ 126,860 100.0 % The Company enters into various collateral arrangements that require both the pledging and acceptance of fixed maturity securities as collateral with derivative, repurchase agreement and reinsurance counterparties. Pledged fixed maturity securities are included in fixed maturity securities, available-for-sale in the condensed consolidated balance sheets. Fixed maturity securities received as collateral are held in separate custodial accounts and are not recorded on the Company’s condensed consolidated balance sheets. Subject to certain constraints, the Company is permitted by contract to sell or re-pledge collateral it receives; however, as of June 30, 2015 and December 31, 2014 , none of the collateral received had been sold or re-pledged. The Company also holds securities in trust to satisfy collateral requirements under certain third-party reinsurance treaties. The following table includes fixed maturity securities pledged and received as collateral, and assets in trust held to satisfy collateral requirements under certain third-party reinsurance treaties as of June 30, 2015 and December 31, 2014 (dollars in thousands): June 30, 2015 December 31, 2014 Amortized Cost Estimated Fair Value Amortized Cost Estimated Fair Value Fixed maturity securities pledged as collateral $ 181,681 $ 190,298 $ 127,229 $ 134,863 Fixed maturity securities received as collateral n/a 126,422 n/a 117,227 Securities held in trust 9,948,045 10,501,206 10,197,489 10,922,947 The Company monitors its concentrations of financial instruments on an ongoing basis, and mitigates credit risk by maintaining a diversified investment portfolio which limits exposure to any one issuer. The Company’s exposure to concentrations of credit risk of single issuers greater than 10% of the Company’s stockholders’ equity included securities of the U.S. government and its agencies as of June 30, 2015, as well as the securities disclosed below as of June 30, 2015 and December 31, 2014 (dollars in thousands). June 30, 2015 December 31, 2014 Amortized Cost Estimated Fair Value Amortized Cost Estimated Fair Value Fixed maturity securities guaranteed or issued by: Canadian province of Ontario $ 921,150 $ 1,295,793 $ 979,908 $ 1,359,339 Canadian province of Quebec 1,012,835 1,560,409 1,006,315 1,599,673 The amortized cost and estimated fair value of fixed maturity securities available-for-sale at June 30, 2015 are shown by contractual maturity in the table below (dollars in thousands). Actual maturities can differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Asset and mortgage-backed securities are shown separately in the table below, as they are not due at a single maturity date. Amortized Cost Estimated Fair Value Available-for-sale: Due in one year or less $ 686,582 $ 696,191 Due after one year through five years 4,882,381 5,118,186 Due after five years through ten years 7,920,478 8,213,365 Due after ten years 9,138,647 10,257,261 Asset and mortgage-backed securities 3,677,244 3,778,972 Total $ 26,305,332 $ 28,063,975 Corporate Fixed Maturity Securities The tables below show the major industry types of the Company’s corporate fixed maturity holdings as of June 30, 2015 and December 31, 2014 (dollars in thousands): June 30, 2015: Estimated Amortized Cost Fair Value % of Total Finance $ 5,238,400 $ 5,419,421 32.9 % Industrial 9,057,282 9,281,262 56.2 Utility 1,705,205 1,788,723 10.9 Total $ 16,000,887 $ 16,489,406 100.0 % December 31, 2014: Estimated Amortized Cost Fair Value % of Total Finance $ 4,789,568 $ 5,066,408 34.0 % Industrial 7,639,330 8,086,067 54.3 Utility 1,581,706 1,733,108 11.7 Total $ 14,010,604 $ 14,885,583 100.0 % Other-Than-Temporary Impairments - Fixed Maturity and Equity Securities As discussed in Note 2 – “Summary of Significant Accounting Policies” of the 2014 Annual Report, a portion of certain other-than-temporary impairment (“OTTI”) losses on fixed maturity securities is recognized in AOCI. For these securities the net amount recognized in the condensed consolidated statements of income (“credit loss impairments”) represents the difference between the amortized cost of the security and the net present value of its projected future cash flows discounted at the effective interest rate implicit in the debt security prior to impairment. Any remaining difference between the fair value and amortized cost is recognized in AOCI. The following table sets forth the amount of pre-tax credit loss impairments on fixed maturity securities held by the Company as of the dates indicated, for which a portion of the OTTI loss was recognized in AOCI, and the corresponding changes in such amounts (dollars in thousands): Three months ended June 30, Six months ended June 30, 2015 2014 2015 2014 Balance, beginning of period $ 7,284 $ 11,696 $ 7,284 $ 11,696 Credit loss OTTI previously recognized on securities which matured, paid down, prepaid or were sold during the period — (4,412 ) — (4,412 ) Balance, end of period $ 7,284 $ 7,284 $ 7,284 $ 7,284 Unrealized Losses for Fixed Maturity and Equity Securities Available-for-Sale The following table presents the total gross unrealized losses for the 1,566 and 932 fixed maturity and equity securities as of June 30, 2015 and December 31, 2014 , respectively, where the estimated fair value had declined and remained below amortized cost by the indicated amount (dollars in thousands): June 30, 2015 December 31, 2014 Gross Unrealized Losses % of Total Gross Unrealized Losses % of Total Less than 20% $ 373,312 94.8 % $ 111,965 83.0 % 20% or more for less than six months 10,201 2.6 13,698 10.1 20% or more for six months or greater 10,328 2.6 9,256 6.9 Total $ 393,841 100.0 % $ 134,919 100.0 % The Company’s determination of whether a decline in value is other-than-temporary includes analysis of the underlying credit and the extent and duration of a decline in value. The Company’s credit analysis of an investment includes determining whether the issuer is current on its contractual payments, evaluating whether it is probable that the Company will be able to collect all amounts due according to the contractual terms of the security and analyzing the overall ability of the Company to recover the amortized cost of the investment. In the Company’s impairment review process, the duration and severity of an unrealized loss position for equity securities are given greater weight and consideration given the lack of contractual cash flows or deferability features. The following tables present the estimated fair values and gross unrealized losses, including other-than-temporary impairment losses reported in AOCI, for 1,566 and 932 fixed maturity and equity securities that have estimated fair values below amortized cost as of June 30, 2015 and December 31, 2014 , respectively (dollars in thousands). These investments are presented by class and grade of security, as well as the length of time the related fair value has remained below amortized cost. Less than 12 months 12 months or greater Total Gross Gross Gross June 30, 2015: Estimated Unrealized Estimated Unrealized Estimated Unrealized Fair Value Losses Fair Value Losses Fair Value Losses Investment grade securities: Corporate securities $ 4,719,168 $ 194,881 $ 299,379 $ 17,451 $ 5,018,547 $ 212,332 Canadian and Canadian provincial governments 117,996 2,860 — — 117,996 2,860 Residential mortgage-backed securities 309,772 6,659 64,855 3,772 374,627 10,431 Asset-backed securities 294,220 3,101 126,602 3,504 420,822 6,605 Commercial mortgage-backed securities 220,262 4,376 22,831 1,392 243,093 5,768 U.S. government and agencies 862,953 86,669 — — 862,953 86,669 State and political subdivisions 157,210 7,399 13,180 3,582 170,390 10,981 Other foreign government, supranational and foreign government-sponsored enterprises 402,345 13,050 33,829 1,988 436,174 15,038 Total investment grade securities 7,083,926 318,995 560,676 31,689 7,644,602 350,684 Below investment grade securities: Corporate securities 553,615 23,667 58,910 5,891 612,525 29,558 Residential mortgage-backed securities 31,443 268 11,779 395 43,222 663 Asset-backed securities 5,305 84 12,102 1,695 17,407 1,779 Commercial mortgage-backed securities 6,523 534 7,544 3,347 14,067 3,881 Other foreign government, supranational and foreign government-sponsored enterprises 62,974 2,502 3,921 172 66,895 2,674 Total below investment grade securities 659,860 27,055 94,256 11,500 754,116 38,555 Total fixed maturity securities $ 7,743,786 $ 346,050 $ 654,932 $ 43,189 $ 8,398,718 $ 389,239 Non-redeemable preferred stock $ 39,466 $ 2,178 $ 6,225 $ 1,442 $ 45,691 $ 3,620 Other equity securities 26,791 982 — — 26,791 982 Total equity securities $ 66,257 $ 3,160 $ 6,225 $ 1,442 $ 72,482 $ 4,602 Less than 12 months 12 months or greater Total Gross Gross Gross December 31, 2014: Estimated Unrealized Estimated Unrealized Estimated Unrealized Fair Value Losses Fair Value Losses Fair Value Losses Investment grade securities: Corporate securities $ 1,225,767 $ 27,784 $ 614,294 $ 30,040 $ 1,840,061 $ 57,824 Canadian and Canadian provincial governments — — 1,235 7 1,235 7 Residential mortgage-backed securities 78,864 846 135,414 5,247 214,278 6,093 Asset-backed securities 332,785 4,021 109,411 4,289 442,196 8,310 Commercial mortgage-backed securities 78,632 564 28,375 2,461 107,007 3,025 U.S. government and agencies 81,317 89 32,959 426 114,276 515 State and political subdivisions 13,780 17 18,998 3,438 32,778 3,455 Other foreign government, supranational and foreign government-sponsored enterprises 156,725 7,007 76,111 2,946 232,836 9,953 Total investment grade securities 1,967,870 40,328 1,016,797 48,854 2,984,667 89,182 Below investment grade securities: Corporate securities 415,886 29,316 32,567 3,404 448,453 32,720 Residential mortgage-backed securities 22,836 293 6,284 225 29,120 518 Asset-backed securities 12,448 274 7,108 1,791 19,556 2,065 Commercial mortgage-backed securities 3,288 249 5,580 5,385 8,868 5,634 State and political subdivisions 964 43 — — 964 43 Other foreign government, supranational and foreign government-sponsored enterprises 13,986 3,136 — — 13,986 3,136 Total below investment grade securities 469,408 33,311 51,539 10,805 520,947 44,116 Total fixed maturity securities $ 2,437,278 $ 73,639 $ 1,068,336 $ 59,659 $ 3,505,614 $ 133,298 Non-redeemable preferred stock $ 11,619 $ 235 $ 19,100 $ 1,292 $ 30,719 $ 1,527 Other equity securities — — 3,545 94 3,545 94 Total equity securities $ 11,619 $ 235 $ 22,645 $ 1,386 $ 34,264 $ 1,621 The Company has no intention to sell nor does it expect to be required to sell the securities outlined in the table above, as of the dates indicated. However, unforeseen facts and circumstances may cause the Company to sell fixed maturity and equity securities in the ordinary course of managing its portfolio to meet certain diversification, credit quality and liquidity guidelines. Unrealized losses on below investment grade securities as of June 30, 2015 are primarily related to high-yield corporate securities and commercial mortgage-backed securities. Unrealized losses increased across most security types as interest rates increased during the first six months of 2015. Investment Income, Net of Related Expenses Major categories of investment income, net of related expenses, consist of the following (dollars in thousands): Three months ended June 30, Six months ended June 30, 2015 2014 2015 2014 Fixed maturity securities available-for-sale $ 303,792 $ 253,456 $ 573,560 $ 497,418 Mortgage loans on real estate 37,121 30,373 71,893 63,465 Policy loans 16,248 13,751 30,288 27,189 Funds withheld at interest 87,325 108,059 199,585 220,798 Short-term investments 814 80 1,509 1,045 Other invested assets 22,418 19,021 34,445 33,522 Investment income 467,718 424,740 911,280 843,437 Investment expense (17,179 ) (14,133 ) (33,850 ) (28,455 ) Investment income, net of related expenses $ 450,539 $ 410,607 $ 877,430 $ 814,982 Investment Related Gains (Losses), Net Investment related gains (losses), net consist of the following (dollars in thousands): Three months ended June 30, Six months ended June 30, 2015 2014 2015 2014 Fixed maturity and equity securities available for sale: Other-than-temporary impairment losses on fixed maturity securities recognized in earnings $ (4,137 ) $ (870 ) $ (6,664 ) $ (1,173 ) Gain on investment activity 20,009 34,887 39,210 42,954 Loss on investment activity (14,475 ) (6,877 ) (28,071 ) (13,460 ) Other impairment losses and change in mortgage loan provision 143 (5,309 ) (4,025 ) (3,645 ) Derivatives and other, net (17,718 ) 96,696 (9,045 ) 178,422 Total investment related gains (losses), net $ (16,178 ) $ 118,527 $ (8,595 ) $ 203,098 The fluctuations in investment related gains (losses) for derivatives and other for the three and six months ended June 30, 2015, compared to the same periods in 2014, are primarily due to changes in the fair value of interest rate swaps and the embedded derivatives related to modified coinsurance and funds withheld treaties, as a result of changes in interest rates. During the three months ended June 30, 2015 and 2014 , the Company sold fixed maturity and equity securities with fair values of $651.3 million and $222.8 million at losses of $14.5 million and $6.9 million , respectively. During the six months ended June 30, 2015 and 2014 , the Company sold fixed maturity and equity securities with fair values of $850.9 million and $457.9 million at losses of $28.1 million and $13.5 million , respectively. The Company generally does not engage in short-term buying and selling of securities. Securities Borrowing and Other The Company participates in securities borrowing programs whereby securities, which are not reflected on the Company’s condensed consolidated balance sheets, are borrowed from third parties. The borrowed securities are used to provide collateral under affiliated reinsurance transactions. The Company is required to maintain a minimum of 100% of the fair value, or par value under certain programs, of the borrowed securities as collateral. The collateral consists of rights to reinsurance treaty cash flows. If cash flows from the reinsurance treaties are insufficient to maintain the minimum collateral requirement, the Company may substitute cash or securities to meet the requirement. No cash or securities have been pledged by the Company for this purpose. During the year, the Company participated in a repurchase program in which securities, reflected as investments on the Company’s condensed consolidated balance sheets, were pledged to a third party. In return, the Company received cash from the third party, reflected as a payable to the third party, included in other liabilities on the condensed consolidated balance sheets. The Company was required to maintain a minimum collateral balance with a fair value of 105% of the cash received. The Company terminated the program and all cash was returned prior to June 30, 2015. The gross balance of the repurchase agreement payable was $101.4 million as of December 31, 2014 . This was fully collateralized by securities with a fair value of $107.2 million as of December 31, 2014 . Additionally, the Company participates in a repurchase/reverse repurchase program in which securities, reflected as investments on the Company’s condensed consolidated balance sheets, are pledged to a third party. In return, the Company receives securities from the third party with an estimated fair value equal to a minimum of 100% of the securities pledged. The securities received are not reflected on the Company’s condensed consolidated balance sheets. The following table includes the amount of borrowed securities, repurchased securities pledged and repurchased/reverse repurchased securities pledged and received as of June 30, 2015 and December 31, 2014 (dollars in thousands). June 30, 2015 December 31, 2014 Amortized Cost Estimated Fair Value Amortized Cost Estimated Fair Value Borrowed securities $ 275,060 $ 284,602 $ 201,050 $ 212,946 Repurchase program securities pledged — — 92,446 107,158 Repurchase program/reverse repurchase program: Securities pledged 298,900 313,771 298,466 314,160 Securities received n/a 340,201 n/a 338,929 The following table presents information on the securities pledged as collateral by the Company related to its repurchase/reverse repurchase program as of June 30, 2015 (dollars in thousands). Collateral associated with certain borrowed securities is not included within the table as the collateral pledged to each counterparty is the right to reinsurance treaty cash flows. June 30, 2015 Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 Days 30-90 Days Greater than 90 Days Total Collateral on repurchase program U.S. treasury and agency securities $ — $ — $ 23,237 $ 177,294 $ 200,531 Residential mortgage-backed securities — — — 104,144 104,144 Other debt instruments 9,096 — — — 9,096 Total borrowings $ 9,096 $ — $ 23,237 $ 281,438 $ 313,771 Gross amount of recognized liabilities for repurchase agreement in preceding table $ 340,201 Amounts related to agreements not included in offsetting disclosure $ 26,430 Mortgage Loans on Real Estate Mortgage loans represented approximately 7.8% and 7.4% of the Company’s total investments as of June 30, 2015 and December 31, 2014 . The Company makes mortgage loans on income producing properties that are geographically diversified throughout the U.S., with the largest concentration being in California, which represented 20.6% and 18.7% of mortgage loans on real estate as of June 30, 2015 and December 31, 2014 , respectively. Loan-to-value ratios at the time of loan approval are 75% or less. The distribution of mortgage loans, gross of valuation allowances, by property type is as follows as of June 30, 2015 and December 31, 2014 (dollars in thousands): June 30, 2015 December 31, 2014 Property type: Recorded Investment % of Total Recorded % of Total Office building $ 957,724 31.1 % $ 851,749 31.3 % Retail 964,540 31.4 802,466 29.6 Industrial 535,856 17.4 466,583 17.2 Apartment 410,213 13.3 376,430 13.8 Other commercial 210,922 6.8 221,481 8.1 Total $ 3,079,255 100.0 % $ 2,718,709 100.0 % The maturities of the mortgage loans, gross of valuation allowances, as of June 30, 2015 and December 31, 2014 are as follows (dollars in thousands): June 30, 2015 December 31, 2014 Recorded Investment % of Total Recorded Investment % of Total Due within five years $ 877,270 28.5 % $ 860,362 31.6 % Due after five years through ten years 1,459,108 47.4 1,165,530 42.9 Due after ten years 742,877 24.1 692,817 25.5 Total $ 3,079,255 100.0 % $ 2,718,709 100.0 % Information regarding the Company’s credit quality indicators, as determined by the Company's internal evaluation methodology for its recorded investment in mortgage loans, gross of valuation allowances, as of June 30, 2015 and December 31, 2014 is as follows (dollars in thousands): June 30, 2015 December 31, 2014 Internal credit quality grade: Recorded Investment % of Total Recorded Investment % of Total High investment grade $ 1,553,149 50.5 % $ 1,326,199 48.8 % Investment grade 1,405,901 45.7 1,235,046 45.4 Average 81,284 2.6 118,152 4.4 Watch list 22,036 0.7 22,285 0.8 In or near default 16,885 0.5 17,027 0.6 Total $ 3,079,255 100.0 % $ 2,718,709 100.0 % None of the payments due to the Company on its recorded investment in mortgage loans were delinquent as of June 30, 2015 and December 31, 2014 . The following table presents the recorded investment in mortgage loans, by method of measuring impairment, and the related valuation allowances as of June 30, 2015 and December 31, 2014 (dollars in thousands): June 30, 2015 December 31, 2014 Mortgage loans: Individually measured for impairment $ 16,885 $ 17,027 Collectively measured for impairment 3,062,370 2,701,682 Mortgage loans, gross of valuation allowances 3,079,255 2,718,709 Valuation allowances: Individually measured for impairment 671 816 Collectively measured for impairment 5,271 5,655 Total valuation allowances 5,942 6,471 Mortgage loans, net of valuation allowances $ 3,073,313 $ 2,712,238 Information regarding the Company’s loan valuation allowances for mortgage loans for the three and six months ended June 30, 2015 and 2014 is as follows (dollars in thousands): Three months ended June 30, Six months ended June 30, 2015 2014 2015 2014 Balance, beginning of period $ 6,130 $ 8,466 $ 6,471 $ 10,106 Charge-offs, net of recoveries — — — 24 Provision (release) (188 ) 1,226 (529 ) (438 ) Balance, end of period $ 5,942 $ 9,692 $ 5,942 $ 9,692 Information regarding the portion of the Company’s mortgage loans that were impaired as of June 30, 2015 and December 31, 2014 is as follows (dollars in thousands): Unpaid Principal Balance Recorded Investment Related Allowance Carrying Value June 30, 2015: Impaired mortgage loans with no valuation allowance recorded $ 4,414 $ 4,354 $ — $ 4,354 Impaired mortgage loans with valuation allowance recorded 13,039 12,531 671 11,860 Total impaired mortgage loans $ 17,453 $ 16,885 $ 671 $ 16,214 December 31, 2014: Impaired mortgage loans with no valuation allowance recorded $ 7,314 $ 6,711 $ — $ 6,711 Impaired mortgage loans with valuation allowance recorded 10,279 10,316 816 9,500 Total impaired mortgage loans $ 17,593 $ 17,027 $ 816 $ 16,211 The Company’s average investment in impaired mortgage loans and the related interest income are reflected in the table below for the periods indicated (dollars in thousands): Three months ended June 30, 2015 2014 Average (1) Interest Income Average Recorded Investment (1) Interest Income Impaired mortgage loans with no valuation allowance recorded $ 5,524 $ 35 $ 14,589 $ 71 Impaired mortgage loans with valuation allowance recorded 11,397 229 15,855 259 Total impaired mortgage loans $ 16,921 $ 264 $ 30,444 $ 330 Six months ended June 30, 2015 2014 Average (1) Interest Income Average (1) Interest Income Impaired mortgage loans with no valuation allowance recorded $ 5,920 $ 141 $ 16,759 $ 389 Impaired mortgage loans with valuation allowance recorded 11,036 384 16,151 452 Total impaired mortgage loans $ 16,956 $ 525 $ 32,910 $ 841 (1) Average recorded investment represents the average loan balances as of the beginning of period and all subsequent quarterly end of period balances. The Company did not acquire any impaired mortgage loans during the six months ended June 30, 2015 and 2014 . The Company had no mortgage loans that were on a nonaccrual status at June 30, 2015 and December 31, 2014 . Policy Loans Policy loans comprised approximately 3.6% and 3.5% of the Company’s total investments as of June 30, 2015 and December 31, 2014 , respectively, the majority of which are associated with one client. These policy loans present no credit risk because the amount of the loan cannot exceed the obligation due to the ceding company upon the death of the insured or surrender of the underlying policy. The provisions of the treaties in force and the underlying policies determine the policy loan interest rates. As policy loans represent premature distributions of policy liabilities, they have the effect of reducing future disintermediation risk. In addition, the Company earns a spread between the interest rate earned on policy loans and the interest rate credited to corresponding liabilities. Funds Withheld at Interest Funds withheld at interest comprised approximately 14.7% and 16.1% of the Company’s total investments as of June 30, 2015 and December 31, 2014 , respectively. Of the $5.8 billion funds withheld at interest balance, net of embedded derivatives, as of June 30, 2015 , $4.2 billion of the balance is associated with one client. For reinsurance agreements written on a modified coinsurance basis and certain agreements written on a coinsurance funds withheld basis, assets equal to the net statutory reserves are withheld and legally owned and managed by the ceding company and are reflected as funds withheld at interest on the Company’s condensed consolidated balance sheets. In the event of a ceding company’s insolvency, the Company would need to assert a claim on the assets supporting its reserve liabilities. However, the risk of loss to the Company is mitigated by its ability to offset amounts it owes the ceding company for claims or allowances against amounts owed to the Company from the ceding company. Other Invested Assets Other invested assets include equity securities, limited partnership interests, joint ventures (other than operating joint ventures), structured loans, derivative contracts, fair value option ("FVO") contractholder-directed unit-linked investments, Federal Home Loan Bank of Des Moines ("FHLB") common stock (included in other in the table below), real estate held-for-investment (included in other in the table below), and equity release mortgages (included in other in the table below). The fair value option was elected for contractholder-directed investments supporting unit-linked variable annuity type liabilities which do not qualify for presentation and reporting as separate accounts. Other invested assets represented approximately 2.8% and 3.3% of the Company’s total investments as of June 30, 2015 and December 31, 2014 , respectively. Carrying values of these assets as of June 30, 2015 and December 31, 2014 are as follows (dollars in thousands): June 30, 2015 December 31, 2014 Equity securities $ 127,668 $ 126,860 Limited partnerships and real estate joint ventures 492,465 446,604 Structured loans 52,185 164,309 Derivatives 194,276 216,966 FVO contractholder-directed unit-linked investments 137,529 140,344 Other 105,984 103,236 Total other invested assets $ 1,110,107 $ 1,198,319

Derivative Instruments

Derivative Instruments	6 Months Ended
	Jun. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	Derivative Instruments Derivatives, except for embedded derivatives and longevity and mortality swaps, are carried on the Company’s condensed consolidated balance sheets in other invested assets or other liabilities, at fair value. Longevity and mortality swaps are included on the condensed consolidated balance sheets in other assets or other liabilities, at fair value. Embedded derivative assets and liabilities on modified coinsurance or funds withheld arrangements are included on the condensed consolidated balance sheets with the host contract in funds withheld at interest, at fair value. Embedded derivative liabilities on indexed annuity and variable annuity products are included on the condensed consolidated balance sheets with the host contract in interest-sensitive contract liabilities, at fair value. The following table presents the notional amounts and gross fair value of derivative instruments prior to taking into account the netting effects of master netting agreements as of June 30, 2015 and December 31, 2014 (dollars in thousands): June 30, 2015 December 31, 2014 Notional Carrying Value/Fair Value Notional Carrying Value/Fair Value Amount Assets Liabilities Amount Assets Liabilities Derivatives not designated as hedging instruments: Interest rate swaps $ 966,658 $ 71,399 $ 11,025 $ 1,144,661 $ 93,783 $ 3,934 Interest rate options — — — 240,000 18,195 — Financial futures 313,905 — — 275,983 — — Foreign currency forwards 60,000 129 7,551 67,967 87 15,098 Consumer price index swaps 39,537 34 57 41,938 — 561 Credit default swaps 891,700 11,757 3,937 805,700 11,689 3,502 Equity options 483,830 44,883 — 555,361 35,242 — Longevity swaps 891,760 10,853 — 450,000 7,727 — Mortality swaps 50,000 — 1,754 50,000 — 797 Synthetic guaranteed investment contracts 6,594,770 — — 6,500,942 — — Embedded derivatives in: Modified coinsurance or funds withheld arrangements — — 3,329 — 22,094 — Indexed annuity products — — 935,619 — — 925,887 Variable annuity products — — 133,535 — — 159,279 Total non-hedging derivatives 10,292,160 139,055 1,096,807 10,132,552 188,817 1,109,058 Derivatives designated as hedging instruments: Interest rate swaps 120,000 — 23,662 120,000 — 18,228 Foreign currency swaps 715,641 88,303 413 676,972 70,906 — Forward bond purchase commitments — — — 196,452 1,175 14,545 Total hedging derivatives 835,641 88,303 24,075 993,424 72,081 32,773 Total derivatives $ 11,127,801 $ 227,358 $ 1,120,882 $ 11,125,976 $ 260,898 $ 1,141,831 Netting Arrangements Certain of the Company’s derivatives are subject to enforceable master netting arrangements and reported as a net asset or liability in the condensed consolidated balance sheets. The Company nets all derivatives that are subject to such arrangements. The Company has elected to include all derivatives, except embedded derivatives, in the tables below, irrespective of whether they are subject to an enforceable master netting arrangement or a similar agreement. See Note 4 – "Investments" for information regarding the Company’s securities borrowing, repurchase and repurchase/reverse repurchase programs. See “Embedded Derivatives” below for information regarding the Company’s bifurcated embedded derivatives. The following table provides information relating to the Company’s derivative instruments as of June 30, 2015 and December 31, 2014 (dollars in thousands): Gross Amounts Not Offset in the Balance Sheet Gross Amounts Recognized Gross Amounts Offset in the Balance Sheet Net Amounts Presented in the Balance Sheet Financial Instruments Cash Collateral Pledged/ Received Net Amount June 30, 2015: Derivative assets $ 227,358 $ (22,230 ) $ 205,128 $ (15,587 ) $ (160,768 ) $ 28,773 Derivative liabilities 48,399 (22,230 ) 26,169 (54,692 ) (4,940 ) (33,463 ) December 31, 2014: Derivative assets $ 238,804 $ (14,111 ) $ 224,693 $ (20,260 ) $ (178,141 ) $ 26,292 Derivative liabilities 56,665 (14,111 ) 42,554 (47,222 ) — (4,668 ) Accounting for Derivative Instruments and Hedging Activities The Company does not enter into derivative instruments for speculative purposes. As discussed below under “Non-qualifying Derivatives and Derivatives for Purposes Other Than Hedging,” the Company uses various derivative instruments for risk management purposes that either do not qualify or have not been qualified for hedge accounting treatment, including derivatives used to economically hedge changes in the fair value of liabilities associated with the reinsurance of variable annuities with guaranteed living benefits. As of June 30, 2015 and December 31, 2014 , the Company held interest rate swaps that were designated and qualified as cash flow hedges of interest rate risk, held foreign currency swaps that were designated and qualified as hedges of a portion of its net investment in its foreign operations, had derivative instruments that were not designated as hedging instruments and, as of December 31, 2014, the Company had forward bond purchase commitments that qualified as cash flow hedges. See Note 2 – “Summary of Significant Accounting Policies” of the Company’s 2014 Annual Report for a detailed discussion of the accounting treatment for derivative instruments, including embedded derivatives. Derivative instruments are carried at fair value and generally require an insignificant amount of cash at inception of the contracts. Cash Flow Hedges Certain derivative instruments are designated as cash flow hedges when they meet the requirements of the general accounting principles for Derivatives and Hedging . The Company designates and accounts for certain interest rate swaps, in which the cash flows are denominated in different currencies, commonly referred to as cross-currency swaps, as cash flow hedges. In addition, the Company designates and accounts for its forward bond purchase commitments as cash flow hedges. The following table presents the components of AOCI, before income tax, and the condensed consolidated income statement classification where the gain or loss is recognized related to cash flow hedges for the three and six months ended June 30, 2015 and 2014 (dollars in thousands): Three months ended June 30, 2015 2014 Accumulated other comprehensive income (loss), balance beginning of period $ (30,598 ) $ (4,020 ) Gains (losses) deferred in other comprehensive income (loss) on the effective portion of cash flow hedges 8,735 4,798 Amounts reclassified to investment related gains (losses), net (1,495 ) — Amounts reclassified to investment income (543 ) (321 ) Accumulated other comprehensive income (loss), balance end of period $ (23,901 ) $ 457 Six months ended June 30, 2015 2014 Accumulated other comprehensive income (loss), balance beginning of period $ (31,591 ) $ (4,578 ) Gains (losses) deferred in other comprehensive income (loss) on the effective portion of cash flow hedges 8,948 5,574 Amounts reclassified to investment related gains (losses), net (655 ) — Amounts reclassified to investment income (603 ) (539 ) Accumulated other comprehensive income (loss), balance end of period $ (23,901 ) $ 457 As of June 30, 2015 , the before-tax deferred net gains on derivative instruments recorded in AOCI that are expected to be reclassified to earnings during the next twelve months are approximately $0.5 million . This expectation is based on the anticipated interest payments on hedged investments in fixed maturity securities that will occur over the next twelve months, at which time the Company will recognize the deferred net gains (losses) as an adjustment to investment income over the term of the investment cash flows. The following table presents the effects of derivatives in cash flow hedging relationships on the condensed consolidated statements of income and AOCI for the three and six months ended June 30, 2015 and 2014 (dollars in thousands): Effective Portion Ineffective Portion Derivative Type Gain (Loss) Recognized in OCI Gain (Loss) Reclassified into Income from OCI Classification of Gain (Loss) Reclassified into Net Income Gain (Loss) Recognized in Income Classification of Gain (Loss) Recognized in Net Income For the three months ended June 30, 2015: Interest rate swaps $ 2,417 $ 231 Investment Income $ — Investment related gains (losses) Forward bond purchase commitments: Principal 6,318 1,495 Investment related gains (losses) — Investment related gains (losses) Interest — 312 Investment Income — Investment related gains (losses) Total $ 8,735 $ 2,038 $ — For the three months ended June 30, 2014: Interest rate swaps $ 4,798 $ 321 Investment Income $ 7 Investment related gains (losses) For the six months ended June 30, 2015: Interest rate swaps $ (5,150 ) $ 291 Investment Income $ 7 Investment related gains (losses) Forward bond purchase commitments: Principal 14,098 655 Investment related gains (losses) — Investment related gains (losses) Interest — 312 Investment Income — Investment related gains (losses) Total $ 8,948 $ 1,258 $ 7 For the six months ended June 30, 2014: Interest rate swaps $ 5,574 $ 539 Investment Income $ 1 Investment related gains (losses) All components of each derivative's gain or loss were included in the assessment of hedge effectiveness. Hedges of Net Investments in Foreign Operations The Company uses foreign currency swaps to hedge a portion of its net investment in certain foreign operations against adverse movements in exchange rates. The following table illustrates the Company’s net investments in foreign operations (“NIFO”) hedges for the three and six months ended June 30, 2015 and 2014 (dollars in thousands): Derivative Gains (Losses) Deferred in AOCI For the three months ended June 30, For the six months ended June 30, Type of NIFO Hedge (1) (2) 2015 2014 2015 2014 Foreign currency swaps $ (12,945 ) $ (22,335 ) $ 37,021 $ 744 (1) There were no sales or substantial liquidations of net investments in foreign operations that would have required the reclassification of gains or losses from accumulated other comprehensive income (loss) into investment income during the periods presented. (2) There was no ineffectiveness recognized for the Company’s hedges of net investments in foreign operations. The cumulative foreign currency translation gain recorded in AOCI related to these hedges was $112.9 million and $75.8 million at June 30, 2015 and December 31, 2014 , respectively. If a foreign operation was sold or substantially liquidated, the amounts in AOCI would be reclassified to the condensed consolidated statements of income. A pro rata portion would be reclassified upon partial sale of a foreign operation. Non-qualifying Derivatives and Derivatives for Purposes Other Than Hedging The Company uses various other derivative instruments for risk management purposes that either do not qualify or have not been qualified for hedge accounting treatment, including derivatives used to economically hedge changes in the fair value of liabilities associated with the reinsurance of variable annuities with guaranteed living benefits. The gain or loss related to the change in fair value for these derivative instruments is recognized in investment related gains (losses), in the condensed consolidated statements of income, except where otherwise noted. A summary of the effect of non-hedging derivatives, including embedded derivatives, on the Company’s income statement for the three and six months ended June 30, 2015 and 2014 is as follows (dollars in thousands): Gain (Loss) for the three months ended June 30, Type of Non-hedging Derivative Income Statement Location of Gain (Loss) 2015 2014 Interest rate swaps Investment related gains (losses), net $ (41,729 ) $ 22,251 Interest rate options Investment related gains (losses), net — 2,004 Financial futures Investment related gains (losses), net (2,183 ) (7,684 ) Foreign currency forwards Investment related gains (losses), net (1,433 ) 1,178 CPI swaps Investment related gains (losses), net 168 114 Credit default swaps Investment related gains (losses), net (187 ) 4,783 Equity options Investment related gains (losses), net (2,606 ) (8,800 ) Longevity swaps Other revenues 1,911 — Mortality swaps Other revenues (478 ) — Subtotal (46,537 ) 13,846 Embedded derivatives in: Modified coinsurance or funds withheld arrangements Investment related gains (losses), net (23,098 ) 78,835 Indexed annuity products Interest credited 8,080 (27,285 ) Variable annuity products Investment related gains (losses), net 50,878 (5,183 ) Total non-hedging derivatives $ (10,677 ) $ 60,213 Gain (Loss) for the six months ended June 30, Type of Non-hedging Derivative Income Statement Location of Gain (Loss) 2015 2014 Interest rate swaps Investment related gains (losses), net $ (12,385 ) $ 51,904 Interest rate options Investment related gains (losses), net 3,275 3,286 Financial futures Investment related gains (losses), net (9,514 ) (9,268 ) Foreign currency forwards Investment related gains (losses), net (1,653 ) 2,332 CPI swaps Investment related gains (losses), net 97 467 Credit default swaps Investment related gains (losses), net 2,471 2,669 Equity options Investment related gains (losses), net (10,672 ) (17,765 ) Longevity swaps Other revenues 3,731 — Mortality swaps Other revenues (957 ) — Subtotal (25,607 ) 33,625 Embedded derivatives in: Modified coinsurance or funds withheld arrangements Investment related gains (losses), net (25,423 ) 156,076 Indexed annuity products Interest credited (21,246 ) (51,125 ) Variable annuity products Investment related gains (losses), net 25,745 (28,844 ) Total non-hedging derivatives $ (46,531 ) $ 109,732 Types of Derivatives Used by the Company Interest Rate Swaps Interest rate swaps are used by the Company primarily to reduce market risks from changes in interest rates and to alter interest rate exposure arising from mismatches between assets and liabilities (duration mismatches). With an interest rate swap, the Company agrees with another party to exchange, at specified intervals, the difference between two rates, which can be either fixed-rate or floating-rate interest amounts, tied to an agreed-upon notional principal amount. These transactions are executed pursuant to master agreements that provide for a single net payment or individual gross payments at each due date. Interest Rate Options Interest rate options, commonly referred to as swaptions, are used by the Company primarily to hedge living benefit guarantees embedded in certain variable annuity products. A swaption, used to hedge against adverse changes in interest rates, is an option to enter into a swap with a forward starting effective date. The Company pays an upfront premium for the right to exercise this option in the future. Financial Futures Exchange-traded futures are used primarily to economically hedge liabilities embedded in certain variable annuity products. With exchange-traded futures transactions, the Company agrees to purchase or sell a specified number of contracts, the value of which is determined by the relevant indices, and to post variation margin on a daily basis in an amount equal to the difference between the daily estimated fair values of those contracts. The Company enters into exchange-traded futures with regulated futures commission merchants that are members of the exchange. Equity Options Equity index options are used by the Company primarily to hedge minimum guarantees embedded in certain variable annuity products. To hedge against adverse changes in equity indices volatility, the Company buys put options. The contracts are net settled in cash based on differentials in the indices at the time of exercise and the strike price. Consumer Price Index Swaps Consumer price index (“CPI”) swaps are used by the Company primarily to economically hedge liabilities embedded in certain insurance products where value is directly affected by changes in a designated benchmark consumer price index. With a CPI swap transaction, the Company agrees with another party to exchange the actual amount of inflation realized over a specified period of time for a fixed amount of inflation determined at inception. These transactions are executed pursuant to master agreements that provide for a single net payment or individual gross payments to be made by the counterparty at each due date. Most of these swaps will require a single payment to be made by one counterparty at the maturity date of the swap. Foreign Currency Swaps Foreign currency swaps are used by the Company to reduce the risk from fluctuations in foreign currency exchange rates associated with its assets and liabilities denominated in foreign currencies. With a foreign currency swap transaction, the Company agrees with another party to exchange, at specified intervals, the difference between one currency and another at a forward exchange rate calculated by reference to an agreed upon principal amount. The principal amount of each currency is exchanged at the termination of the currency swap by each party. The Company uses foreign currency swaps to hedge a portion of its net investment in certain foreign operations against adverse movements in exchange rates. Foreign Currency Forwards Foreign currency forwards are used by the Company to reduce the risk from fluctuations in foreign currency exchange rates associated with its assets and liabilities denominated in foreign currencies. With a foreign currency forward transaction, the Company agrees with another party to deliver a specified amount of an identified currency at a specified future date. The price is agreed upon at the time of the contract and payment for such a contract is made in a different currency at the specified future date. Forward Bond Purchase Commitments Forward bond purchase commitments are used by the Company to hedge against the variability in the anticipated cash flows required to purchase securities. With forward bond purchase commitments, the forward price is agreed upon at the time of the contract and payment for such contract is made at the future specified settlement date of the securities. Credit Default Swaps The Company sells protection under single name credit default swaps and credit default swap index tranches to diversify its credit risk exposure in certain portfolios and, in combination with purchasing securities, to replicate characteristics of similar investments based on the credit quality and term of the credit default swap. Credit default triggers for indexed reference entities and single name reference entities are defined in the contracts. The Company’s maximum exposure to credit loss equals the notional value for credit default swaps. In the event of default of a referencing entity, the Company is typically required to pay the protection holder the full notional value less a recovery amount determined at auction. The following table presents the estimated fair value, maximum amount of future payments and weighted average years to maturity of credit default swaps sold by the Company at June 30, 2015 and December 31, 2014 (dollars in thousands): June 30, 2015 December 31, 2014 Rating Agency Designation of Referenced Credit Obligations (1) Estimated Fair Value of Credit Default Swaps Maximum Amount of Future Payments under Credit Default Swaps (2) Weighted Average Years to Maturity (3) Estimated Fair Value of Credit Default Swaps Maximum Amount of Future Payments under Credit Default Swaps (2) Weighted Average Years to Maturity (3) AAA/AA-/A+/A/A- Single name credit default swaps $ 2,250 $ 189,500 4.6 $ 1,498 $ 167,500 4.6 Credit default swaps referencing indices — — — — — — Subtotal 2,250 189,500 4.6 1,498 167,500 4.6 BBB+/BBB/BBB- Single name credit default swaps (182 ) 281,200 4.8 168 217,200 4.9 Credit default swaps referencing indices 5,923 416,000 5.0 6,651 416,000 5.0 Subtotal 5,741 697,200 4.9 6,819 633,200 4.9 BB+ Single name credit default swaps (171 ) 5,000 4.0 (130 ) 5,000 4.5 Credit default swaps referencing indices — — — — — — Subtotal (171 ) 5,000 4.0 (130 ) 5,000 4.5 Total $ 7,820 $ 891,700 4.8 $ 8,187 $ 805,700 4.9 (1) The rating agency designations are based on ratings from Standard and Poor’s (“S&P”). (2) Assumes the value of the referenced credit obligations is zero. (3) The weighted average years to maturity of the credit default swaps is calculated based on weighted average notional amounts. Longevity Swaps The Company enters into longevity swaps in the form of out-of-the-money options, which provide protection against changes in mortality improvement to retirement plans and insurers of such plans. With a longevity swap transaction, the Company agrees with another party to exchange a proportion of a notional value. The proportion is determined by the difference between a predefined benefit, and the realized benefit plus the future expected benefit, calculated by reference to a population index for a fixed premium. Mortality Swaps Mortality swaps are used by the Company to hedge risk from changes in mortality experience associated with its reinsurance of life insurance risk. The Company agrees with another party to exchange, at specified intervals, a proportion of a notional value determined by the difference between a predefined expected and realized claim amount on a designated index of reinsured lives, for a fixed percentage (premium) each term. Synthetic Guaranteed Investment Contracts The Company sells fee-based synthetic guaranteed investment contracts which include investment-only, stable value contracts, to retirement plans. The assets are owned by the trustees of such plans, who invest the assets under the terms of investment guidelines agreed to with the Company. The contracts contain a guarantee of a minimum rate of return on participant balances supported by the underlying assets, and a guarantee of liquidity to meet certain participant-initiated plan cash flow requirements. These contracts are reported as derivatives, recorded at fair value and classified as interest rate derivatives. Embedded Derivatives The Company has certain embedded derivatives which are required to be separated from their host contracts and reported as derivatives. Host contracts include reinsurance treaties structured on a modified coinsurance (“modco”) or funds withheld basis. The valuation of embedded derivatives is sensitive to the investment credit spread environment. Changes in investment credit spreads are also affected by the application of a credit valuation adjustment (“CVA”). The fair value calculation of an embedded derivative in an asset position utilizes a CVA based on the ceding company’s credit risk. Conversely, the fair value calculation of an embedded derivative in a liability position utilizes a CVA based on the Company’s credit risk. Generally, an increase in investment credit spreads, ignoring changes in the CVA, will have a negative impact on the fair value of the embedded derivative (decrease in income). Changes in fair values of embedded derivatives on modco or funds withheld treaties are net of an increase (decrease) in investment related gains (losses) of $0.2 million and $(0.5) million for the three months and $0.2 million and $(1.3) million for the six months ended June 30, 2015 and 2014, respectively, associated with a CVA. The Company also reinsures equity-indexed annuity and variable annuity contracts with benefits that are considered embedded derivatives, including guaranteed minimum withdrawal benefits, guaranteed minimum accumulation benefits, and guaranteed minimum income benefits. Changes in fair values of embedded derivatives on variable annuity contracts are net of an increase (decrease) in investment related gains (losses) of $(1.3) million and $0.1 million for the three months, and $(0.8) million and $0.5 million for the six month periods ended June 30, 2015 and 2014, associated with a CVA. The related gains (losses) and the effect on net income after amortization of deferred acquisition costs (“DAC”) and income taxes for the three and six months ended June 30, 2015 and 2014 are reflected in the following table (dollars in thousands): Three months ended June 30, Six months ended June 30, 2015 2014 2015 2014 Embedded derivatives in modco or funds withheld arrangements included in investment related gains $ (23,098 ) $ 78,835 $ (25,423 ) $ 156,076 After the associated amortization of DAC and taxes, the related amounts included in net income (3,917 ) 17,962 (6,504 ) 36,042 Embedded derivatives in variable annuity contracts included in investment related gains 50,878 (5,183 ) 25,745 (28,844 ) After the associated amortization of DAC and taxes, the related amounts included in net income 19,608 (6,486 ) 10,198 (20,154 ) Amounts related to embedded derivatives in equity-indexed annuities included in benefits and expenses 8,080 (27,285 ) (21,246 ) (51,125 ) After the associated amortization of DAC and taxes, the related amounts included in net income 1,233 (15,600 ) (14,766 ) (33,976 ) Credit Risk The Company manages its credit risk related to over-the-counter ("OTC") derivatives by entering into transactions with creditworthy counterparties, maintaining collateral arrangements and through the use of master netting agreements that provide for a single net payment to be made by one counterparty to another at each due date and upon termination. The credit exposure of the Company's OTC derivative transactions is represented by the contracts with a positive fair value (market value) at the reporting date. To reduce credit exposures, the Company seeks to (i) enter into OTC derivative transactions pursuant to master netting agreements that provide for a netting of payments and receipts with a single counterparty, and (ii) enter into agreements that allow the use of credit support annexes, which are bilateral rating-sensitive agreements that require collateral postings at established threshold levels. Certain of the Company's OTC derivatives are cleared derivatives, which are bilateral transactions between the Company and a counterparty where the transactions are cleared through a clearinghouse, such that each derivative counterparty is only exposed to the default of the clearinghouse. These cleared transactions require initial and daily variation margin collateral postings and include certain interest rate swaps and credit default swaps entered into on or after June 10, 2013, related to guidelines implemented under the Dodd-Frank Wall Street Reform and Consumer Protection Act. Also, the Company enters into exchange-traded futures through regulated exchanges and these transactions are settled on a daily basis, thereby reducing credit risk exposure in the event of non-performance by counterparties to such financial instruments. The Company enters into various collateral arrangements, which require both the posting and accepting of collateral in connection with its derivative instruments. Collateral agreements contain attachment thresholds that may vary depending on the posting party’s ratings. Additionally, a decline in the Company’s or the counterparty’s credit ratings to specified levels could result in potential settlement of the derivative positions under the Company’s agreements with its counterparties. The Company also has exchange-traded futures, which require the maintenance of a margin account. As exchange-traded futures are affected through regulated exchanges, and positions are marked to market on a daily basis, the Company has minimal exposure to credit-related losses in the event of nonperformance by counterparties. The Company’s credit exposure related to derivative contracts is generally limited to the fair value at the reporting date plus or minus any collateral posted or held by the Company. The Company’s credit exposure to non-investment swaps is minimal, as mortality swaps are fully collateralized by a counterparty and longevity swaps would require posting of collateral only upon the occurrence of certain agreed upon events. Information regarding the Company’s credit exposure related to its over-the-counter derivative contracts, centrally cleared derivative contracts and margin account for exchange-traded futures, excluding longevity and mortality swaps, at June 30, 2015 and December 31, 2014 are reflected in the following table (dollars in thousands): June 30, 2015 December 31, 2014 Estimated fair value of derivatives in net asset position $ 169,860 $ 175,209 Cash provided as collateral (1) 4,940 — Securities pledged to counterparties as collateral (2) 54,692 47,222 Cash pledged from counterparties as collateral (3) (160,768 ) (178,141 ) Securities pledged from counterparties as collateral (4) (15,587 ) (20,260 ) Initial margin for cleared derivatives (2) (31,960 ) (16,333 ) Net credit exposure $ 21,177 $ 7,697 Margin account related to exchange-traded futures (5) $ 6,283 $ 7,976 (1) Consists of receivable from counterparty, included in other assets. (2) Included in available-for-sale securities, primarily consists of U.S. Treasury securities. (3) Included in cash and cash equivalents, with obligation to return cash collateral recorded in other liabilities. (4) Consists of U.S. Treasury securities. (5) Included in cash and cash equivalents.

Fair Value of Assets and Liabil

Fair Value of Assets and Liabilities	6 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value Disclosures	Fair Value of Assets and Liabilities Fair Value Measurement General accounting principles for Fair Value Measurements and Disclosures define fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. These principles also establish a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value and describes three levels of inputs that may be used to measure fair value: Level 1 - Unadjusted quoted prices in active markets for identical assets or liabilities. Active markets are defined as having the following characteristics for the measured asset/liability: (i) many transactions, (ii) current prices, (iii) price quotes not varying substantially among market makers, (iv) narrow bid/ask spreads and (v) most information publicly available. The Company’s Level 1 assets include investment securities that are traded in exchange markets. Level 2 - Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or market standard valuation techniques and assumptions with significant inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Such observable inputs include benchmarking prices for similar assets in active, liquid markets, quoted prices in markets that are not active and observable yields and spreads in the market. The Company’s Level 2 assets and liabilities include investment securities with quoted prices that are traded less frequently than exchange-traded instruments and derivative contracts whose values are determined using market standard valuation techniques. This category primarily includes corporate securities, Canadian and Canadian provincial government securities, and residential and commercial mortgage-backed securities, and other foreign government, supranational and foreign government sponsored enterprises among others. Level 2 valuations are generally obtained from third party pricing services for identical or comparable assets or liabilities or through the use of valuation methodologies using observable market inputs. Prices from servicers are validated through analytical reviews and assessment of current market activity. Level 3 - Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the related assets or liabilities. Level 3 assets and liabilities include those whose value is determined using market standard valuation techniques described above. When observable inputs are not available, the market standard techniques for determining the estimated fair value of certain securities that trade infrequently, and therefore have little transparency, rely on inputs that are significant to the estimated fair value and that are not observable in the market or cannot be derived principally from or corroborated by observable market data. These unobservable inputs can be based in large part on management judgment or estimation and cannot be supported by reference to market activity. Even though unobservable, management believes these inputs are based on assumptions deemed appropriate given the circumstances and consistent with what other market participants would use when pricing similar assets and liabilities. For the Company’s invested assets, this category generally includes corporate securities (primarily private placements and bank loans), asset-backed securities (including collateralized debt obligations and those with exposure to subprime mortgages), and to a lesser extent, certain residential and commercial mortgage-backed securities, and state and political subdivisions among others. Prices are determined using valuation methodologies such as discounted cash flow models and other similar techniques. Non-binding broker quotes, which are utilized when pricing service information is not available, are reviewed for reasonableness based on the Company’s understanding of the market, and are generally considered Level 3. Under certain circumstances, based on its observations of transactions in active markets, the Company may conclude the prices received from independent third party pricing services or brokers are not reasonable or reflective of market activity. In those instances, the Company would apply internally developed valuation techniques to the related assets or liabilities. Additionally, the Company’s embedded derivatives, all of which are associated with reinsurance treaties and longevity and mortality swaps, are classified in Level 3 since their values include significant unobservable inputs. When inputs used to measure fair value fall within different levels of the hierarchy, the level within which the fair value measurement is categorized is based on the lowest level input that is significant to the fair value measurement in its entirety. For example, a Level 3 fair value measurement may include inputs that are observable (Levels 1 and 2) and unobservable (Level 3). Therefore, gains and losses for such assets and liabilities categorized within Level 3 may include changes in fair value that are attributable to both observable inputs (Levels 1 and 2) and unobservable inputs (Level 3). Assets and Liabilities by Hierarchy Level Assets and liabilities measured at fair value on a recurring basis as of June 30, 2015 and December 31, 2014 are summarized below (dollars in thousands): June 30, 2015: Fair Value Measurements Using: Total Level 1 Level 2 Level 3 Assets: Fixed maturity securities – available-for-sale: Corporate securities $ 16,489,406 $ 157,790 $ 15,094,299 $ 1,237,317 Canadian and Canadian provincial governments 3,793,807 — 3,793,807 — Residential mortgage-backed securities 1,190,879 — 892,503 298,376 Asset-backed securities 1,062,624 — 482,114 580,510 Commercial mortgage-backed securities 1,525,469 — 1,447,650 77,819 U.S. government and agencies 1,263,998 1,111,189 125,450 27,359 State and political subdivisions 506,172 — 465,986 40,186 Other foreign government supranational and foreign government-sponsored enterprises 2,231,620 268,042 1,948,921 14,657 Total fixed maturity securities – available-for-sale 28,063,975 1,537,021 24,250,730 2,276,224 Funds withheld at interest – embedded derivatives (3,329 ) — — (3,329 ) Cash equivalents 665,037 665,037 — — Short-term investments 34,733 20,896 13,837 — Other invested assets: Non-redeemable preferred stock 90,574 78,186 — 12,388 Other equity securities 37,094 37,094 — — Derivatives: Interest rate swaps 52,864 — 52,864 — CPI swaps (23 ) — (23 ) — Credit default swaps 8,248 — 8,248 — Equity options 44,883 — 44,883 — Foreign currency swaps 88,303 — 88,303 — FVO contractholder-directed unit-linked investments 137,529 132,870 4,659 — Other 9,852 9,852 — — Total other invested assets 469,324 258,002 198,934 12,388 Other assets – longevity swaps 10,853 — — 10,853 Total $ 29,240,593 $ 2,480,956 $ 24,463,501 $ 2,296,136 Liabilities: Interest sensitive contract liabilities – embedded derivatives $ 1,069,154 $ — $ — $ 1,069,154 Other liabilities: Derivatives: Interest rate swaps 16,152 — 16,152 — Foreign currency forwards 7,422 — 7,422 — Credit default swaps 428 — 428 — Foreign currency swaps 413 — 413 — Mortality swaps 1,754 — — 1,754 Total $ 1,095,323 $ — $ 24,415 $ 1,070,908 December 31, 2014: Fair Value Measurements Using: Total Level 1 Level 2 Level 3 Assets: Fixed maturity securities – available-for-sale: Corporate securities $ 14,885,583 $ 115,822 $ 13,459,334 $ 1,310,427 Canadian and Canadian provincial governments 3,865,265 — 3,865,265 — Residential mortgage-backed securities 1,037,896 — 849,802 188,094 Asset-backed securities 1,069,586 — 496,626 572,960 Commercial mortgage-backed securities 1,532,591 — 1,445,845 86,746 U.S. government and agencies 525,851 437,129 60,193 28,529 State and political subdivisions 426,076 — 383,365 42,711 Other foreign government, supranational and foreign government-sponsored enterprises 2,138,124 285,995 1,832,466 19,663 Total fixed maturity securities – available-for-sale 25,480,972 838,946 22,392,896 2,249,130 Funds withheld at interest – embedded derivatives 22,094 — — 22,094 Cash equivalents 899,846 899,846 — — Short-term investments 45,190 21,536 23,654 — Other invested assets: Non-redeemable preferred stock 99,363 91,450 9 7,904 Other equity securities 27,497 27,497 — — Derivatives: Interest rate swaps 84,578 — 84,578 — Interest rate options 18,195 — 18,195 — CPI swaps (561 ) — (561 ) — Credit default swaps 8,606 — 8,606 — Equity options 35,242 — 35,242 — Foreign currency swaps 70,906 — 70,906 — FVO contractholder-directed unit-linked investments 140,344 134,749 5,595 — Other 6,420 6,420 — — Total other invested assets 490,590 260,116 222,570 7,904 Other assets - longevity swaps 7,727 — — 7,727 Total $ 26,946,419 $ 2,020,444 $ 22,639,120 $ 2,286,855 Liabilities: Interest sensitive contract liabilities – embedded derivatives $ 1,085,166 $ — $ — $ 1,085,166 Other liabilities: Derivatives: Interest rate swaps 12,957 — 12,957 — Foreign currency forwards 15,011 — 15,011 — Credit default swaps 419 — 419 — Forward purchase commitments 13,370 — 13,370 — Mortality swaps 797 — — 797 Total $ 1,127,720 $ — $ 41,757 $ 1,085,963 The Company may utilize information from third parties, such as pricing services and brokers, to assist in determining the fair value for certain assets and liabilities; however, management is ultimately responsible for all fair values presented in the Company’s condensed consolidated financial statements. This includes responsibility for monitoring the fair value process, ensuring objective and reliable valuation practices and pricing of assets and liabilities, and approving changes to valuation methodologies and pricing sources. The selection of the valuation technique(s) to apply considers the definition of an exit price and the nature of the asset or liability being valued and significant expertise and judgment is required. The Company performs initial and ongoing analysis and review of the various techniques utilized in determining fair value to ensure that the valuation approaches utilized are appropriate and consistently applied, and that the various assumptions are reasonable. The Company also performs ongoing analysis and review of the information and prices received from third parties to ensure that the prices represent a reasonable estimate of the fair value and to monitor controls around pricing, which includes quantitative and qualitative analysis and is overseen by the Company’s investment and accounting personnel. Examples of procedures performed include, but are not limited to, review of pricing trends, comparison of a sample of executed prices of securities sold to the fair value estimates, comparison of fair value estimates to management’s knowledge of the current market, and ongoing confirmation that third party pricing services use, wherever possible, market-based parameters for valuation. In addition, the Company utilizes both internal and external cash flow models to analyze the reasonableness of fair values utilizing credit spread and other market assumptions, where appropriate. As a result of the analysis, if the Company determines there is a more appropriate fair value based upon the available market data, the price received from the third party is adjusted accordingly. The Company also determines if the inputs used in estimated fair values received from pricing services are observable by assessing whether these inputs can be corroborated by observable market data. The fair value of embedded derivative liabilities, including those calculated by third parties, are monitored through the use of attribution reports to quantify the effect of underlying sources of fair value change, including capital market inputs based on policyholder account values, interest rates and short-term and long-term implied volatilities, from period to period. Actuarial assumptions are based on experience studies performed internally in combination with available industry information and are reviewed on a periodic basis, at least annually. For assets and liabilities reported at fair value, the Company utilizes, when available, fair values based on quoted prices in active markets that are regularly and readily obtainable. Generally, these are very liquid investments and the valuation does not require management judgment. When quoted prices in active markets are not available, fair value is based on market valuation techniques, market comparable pricing and the income approach. The use of different techniques, assumptions and inputs may have a material effect on the estimated fair values of the Company’s securities holdings. For the periods presented, the application of market standard valuation techniques applied to similar assets and liabilities has been consistent. The methods and assumptions the Company uses to estimate the fair value of assets and liabilities measured at fair value on a recurring basis are summarized below. Fixed Maturity Securities – The fair values of the Company’s publicly-traded fixed maturity securities are generally based on prices obtained from independent pricing services. Prices from pricing services are sourced from multiple vendors, and a vendor hierarchy is maintained by asset type based on historical pricing experience and vendor expertise. The Company generally receives prices from multiple pricing services for each security, but ultimately uses the price from the pricing service highest in the vendor hierarchy based on the respective asset type. To validate reasonableness, prices are periodically reviewed as explained above. Consistent with the fair value hierarchy described above, securities with validated quotes from pricing services are generally reflected within Level 2, as they are primarily based on observable pricing for similar assets and/or other market observable inputs. If the pricing information received from third party pricing services is not reflective of market activity or other inputs observable in the market, the Company may challenge the price through a formal process with the pricing service. If the Company ultimately concludes that pricing information received from the independent pricing service is not reflective of market activity, non-binding broker quotes are used, if available. If the Company concludes the values from both pricing services and brokers are not reflective of market activity, it may override the information from the pricing service or broker with an internally developed valuation; however, this occurs infrequently. Internally developed valuations or non-binding broker quotes are also used to determine fair value in circumstances where vendor pricing is not available. These estimates may use significant unobservable inputs, which reflect the Company’s assumptions about the inputs that market participants would use in pricing the asset. Circumstances where observable market data are not available may include events such as market illiquidity and credit events related to the security. Pricing service overrides, internally developed valuations and non-binding broker quotes are generally based on significant unobservable inputs and are reflected as Level 3 in the valuation hierarchy. The inputs used in the valuation of corporate and government securities include, but are not limited to standard market observable inputs which are derived from, or corroborated by, market observable data including market yield curve, duration, call provisions, observable prices and spreads for similar publicly traded or privately traded issues that incorporate the credit quality and industry sector of the issuer. For structured securities, valuation is based primarily on matrix pricing or other similar techniques using standard market inputs including spreads for actively traded securities, spreads off benchmark yields, expected prepayment speeds and volumes, current and forecasted loss severity, rating, weighted average coupon, weighted average maturity, average delinquency rates, geographic region, debt-service coverage ratios and issuance-specific information including, but not limited to: collateral type, payment terms of the underlying assets, payment priority within the tranche, structure of the security, deal performance and vintage of loans. When observable inputs are not available, the market standard valuation techniques for determining the estimated fair value of certain types of securities that trade infrequently, and therefore have little or no price transparency, rely on inputs that are significant to the estimated fair value that are not observable in the market or cannot be derived principally from or corroborated by observable market data. These unobservable inputs can be based in large part on management judgment or estimation, and cannot be supported by reference to market activity. Even though unobservable, these inputs are based on assumptions deemed appropriate given the circumstances and are believed to be consistent with what other market participants would use when pricing such securities. The fair values of private placement securities are primarily determined using a discounted cash flow model. In certain cases these models primarily use observable inputs with a discount rate based upon the average of spread surveys collected from private market intermediaries who are active in both primary and secondary transactions, taking into account, among other factors, the credit quality and industry sector of the issuer and the reduced liquidity associated with private placements. Generally, these securities have been reflected within Level 3. For certain private fixed maturities, the discounted cash flow model may also incorporate significant unobservable inputs, which reflect the Company’s own assumptions about the inputs market participants would use in pricing the security. To the extent management determines that such unobservable inputs are not significant to the price of a security, a Level 2 classification is made. Otherwise, a Level 3 classification is used. Embedded Derivatives – For embedded derivative liabilities associated with the underlying products in reinsurance treaties, primarily equity-indexed and variable annuity treaties, the Company utilizes a discounted cash flow model, which includes an estimate of future equity option purchases and an adjustment for a CVA. The variable annuity embedded derivative calculations are performed by third parties based on methodology and input assumptions provided by the Company. To validate the reasonableness of the resulting fair value, the Company’s internal actuaries perform reviews and analytical procedures on the results. The capital market inputs to the model, such as equity indexes, short-term equity volatility and interest rates, are generally observable. The valuation also requires certain significant inputs, which are generally not observable and accordingly, the valuation is considered Level 3 in the fair value hierarchy, see “Level 3 Measurements and Transfers” below for a description. The fair value of embedded derivatives associated with funds withheld reinsurance treaties is determined based upon a total return swap technique with reference to the fair value of the investments held by the ceding company that support the Company’s funds withheld at interest asset with an adjustment for a CVA. The fair value of the underlying assets is generally based on market observable inputs using industry standard valuation techniques. The valuation also requires certain significant inputs, which are generally not observable and accordingly, the valuation is considered Level 3 in the fair value hierarchy, see “Level 3 Measurements and Transfers” below for a description. Credit Valuation Adjustment – The Company uses a structural default risk model to estimate a CVA. The input assumptions are a combination of externally derived and published values (default threshold and uncertainty), market inputs (interest rate, equity price per share, debt per share, equity price volatility) and insurance industry data (Loss Given Default), adjusted for market recoverability. Cash Equivalents and Short-Term Investments – Cash equivalents and short-term investments include money market instruments, commercial paper and other highly liquid debt instruments. Money market instruments are generally valued using unadjusted quoted prices in active markets that are accessible for identical assets and are primarily classified as Level 1. The fair value of certain other short-term investments, such as floating rate notes and bonds with original maturities less than twelve months, are based upon other market observable data and are typically classified as Level 2. However, certain short-term investments may incorporate significant unobservable inputs resulting in a Level 3 classification. Various time deposits carried as cash equivalents or short-term investments are not measured at estimated fair value and therefore are excluded from the tables presented. Equity Securities – Equity securities consist principally of exchange-traded funds and preferred stock of publicly and privately traded companies. The fair values of publicly traded equity securities are primarily based on quoted market prices in active markets and are classified within Level 1 in the fair value hierarchy. The fair values of preferred equity securities, for which quoted market prices are not readily available, are based on prices obtained from independent pricing services and these securities are generally classified within Level 2 in the fair value hierarchy. Non-binding broker quotes for equity securities are generally based on significant unobservable inputs and are reflected as Level 3 in the fair value hierarchy. FVO Contractholder-Directed Unit-Linked Investments - FVO contractholder-directed investments supporting unit-linked variable annuity type liabilities primarily consist of exchange-traded funds and, to a lesser extent, fixed maturity securities and cash and cash equivalents. The fair values of the exchange-traded securities are primarily based on quoted market prices in active markets and are classified within Level 1 of the hierarchy. The fair value of the fixed maturity contractholder-directed securities is determined on a basis consistent with the methodologies described above for fixed maturity securities and are classified within Level 2 of the hierarchy. Derivative Assets and Derivative Liabilities – All of the derivative instruments utilized by the Company, except for longevity and mortality swaps, are classified within Level 2 on the fair value hierarchy. These derivatives are principally valued using an income approach. Valuations of interest rate contracts are based on present value techniques, which utilize significant inputs that may include the swap yield curve, LIBOR basis curves, and repurchase rates. Valuations of foreign currency contracts, are based on present value techniques, which utilize significant inputs that may include the swap yield curve, LIBOR basis curves, currency spot rates, and cross currency basis curves. Valuations of credit contracts are based on present value techniques, which utilize significant inputs that may include the swap yield curve, credit curves, and recovery rates. Valuations of equity market contracts, are based on present value techniques, which utilize significant inputs that may include the swap yield curve, spot equity index levels, and dividend yield curves. Valuations of equity market contracts, option-based, are based on option pricing models, which utilize significant inputs that may include the swap yield curve, spot equity index levels, dividend yield curves, and equity volatility. The Company does not currently have derivatives, except for longevity and mortality swaps, included in Level 3 measurement. Longevity and Mortality Swaps – The Company utilizes a discounted cash flow model to estimate the fair value of longevity and mortality swaps. The fair value of these swaps includes an accrual for premiums payable and receivable. Some inputs to the valuation model are generally observable, such as interest rates and actual population mortality experience. The valuation also requires significant inputs that are generally not observable and, accordingly, the valuation is considered Level 3 in the fair value hierarchy. Level 3 Measurements and Transfers As of June 30, 2015 and December 31, 2014 , the Company classified approximately 8.1% and 8.8% , respectively, of its fixed maturity securities in the Level 3 category. These securities primarily consist of private placement corporate securities and bank loans with inactive trading markets. Additionally, the Company has included asset-backed securities with subprime exposure and mortgage-backed securities with below investment grade ratings in the Level 3 category due to market uncertainty associated with these securities and the Company’s utilization of unobservable information from third parties for the valuation of these securities. The significant unobservable inputs used in the fair value measurement of the Company’s corporate, sovereign, government-backed, and other political subdivision investments are probability of default, liquidity premium and subordination premium. Significant increases (decreases) in any of those inputs in isolation would result in a significantly lower (higher) fair value measurement. Generally, a change in the assumption used for the probability of default is accompanied by a directionally similar change in the assumptions used for the liquidity premium and subordination premium. For securities with a fair value derived using the market comparable pricing valuation technique, liquidity premium is the only significant unobservable input. The significant unobservable inputs used in the fair value measurement of the Company’s asset and mortgage-backed securities are prepayment rates, probability of default, liquidity premium and loss severity in the event of default. Significant increases (decreases) in any of those inputs in isolation would result in a significantly lower (higher) fair value measurement. Generally, a change in the assumption used for the probability of default is accompanied by a directionally similar change in the assumption used for the liquidity premium and loss severity and a directionally opposite change in the assumption used for prepayment rates. The actuarial assumptions used in the fair value of embedded derivatives which include assumptions related to lapses, withdrawals, and mortality, are based on experience studies performed by the Company in combination with available industry information and are reviewed on a periodic basis, at least annually. The significant unobservable inputs used in the fair value measurement of embedded derivatives are assumptions associated with policyholder experience and selected capital market assumptions for equity-indexed and variable annuities. The selected capital market assumptions, which include long-term implied volatilities, are projections based on short-term historical information. Changes in interest rates, equity indices, equity volatility, CVA, and actuarial assumptions regarding policyholder experience may result in significant fluctuations in the value of embedded derivatives. Fair value measurements associated with funds withheld reinsurance treaties are generally not materially sensitive to changes in unobservable inputs associated with policyholder experience. The primary drivers of change in these fair values are related to movements of credit spreads, which are generally observable. Increases (decreases) in market credit spreads tend to decrease (increase) the fair value of embedded derivatives. Increases (decreases) in the CVA assumption tend to decrease (increase) the magnitude of the fair value of embedded derivatives. Fair value measurements associated with variable annuity treaties are sensitive to both capital markets inputs and policyholder experience inputs. Increases (decreases) in lapse rates tend to decrease (increase) the value of the embedded derivatives associated with variable annuity treaties. Increases (decreases) in the long-term volatility assumption tend to increase (decrease) the fair value of embedded derivatives. Increases (decreases) in the CVA assumption tend to decrease (increase) the magnitude of the fair value of embedded derivatives. The actuarial assumptions used in the fair value of longevity and mortality swaps include assumptions related to the level and volatility of mortality. The assumptions are based on studies performed by the Company in combination with available industry information and are reviewed on a periodic basis, at least annually. The following table presents quantitative information about significant unobservable inputs used in Level 3 fair value measurements that are developed by the Company, which does not include unobservable Level 3 asset and liability measurements provided by third parties, as of June 30, 2015 and December 31, 2014 (dollars in thousands): June 30, 2015: Valuation Technique Unobservable Inputs Range (Weighted Average) Fair Value Assets: State and political subdivision securities $ 4,817 Market comparable securities Liquidity premium 1 % Corporate securities 205,003 Market comparable securities Liquidity premium 0-2% (1%) U.S. government and agencies securities 27,359 Market comparable securities Liquidity premium 0-1% (1%) Funds withheld at interest- embedded derivatives (3,329 ) Total return swap Mortality 0-100% (2%) Lapse 0-35% (8%) Withdrawal 0-5% (3%) CVA 0-5% (1%) Crediting rate 2-4% (3%) Longevity swaps 10,853 Discounted cash flow Mortality 0-100% (2%) Mortality improvement (10%)-10% (3%) Liabilities: Interest sensitive contract liabilities- embedded derivatives- indexed annuities 935,619 Discounted cash flow Mortality 0-100% (2%) Lapse 0-35% (8%) Withdrawal 0-5% (3%) Option budget projection 2-4% (3%) Interest sensitive contract liabilities- embedded derivatives- variable annuities 133,535 Discounted cash flow Mortality 0-100% (2%) Lapse 0-25% (9%) Withdrawal 0-7% (3%) CVA 0-5% (1%) Long-term volatility 0-27% (14%) Mortality swaps 1,754 Discounted cash flow Mortality 0-100% (1%) December 31, 2014: Fair Value Valuation Technique(s) Unobservable Input Range (Weighted Average) Assets: State and political subdivision securities $ 4,994 Market comparable securities Liquidity premium 1 % Corporate securities 205,392 Market comparable securities Liquidity premium 0-2% (1%) U.S. government and agencies securities 28,530 Market comparable securities Liquidity premium 0-1% (1%) Funds withheld at interest- embedded derivatives 22,094 Total return swap Mortality 0-100% (2%) Lapse 0-35% (7%) Withdrawal 0-5% (3%) CVA 0-5% (1%) Crediting rate 2-4% (3%) Longevity swaps 7,727 Discounted cash flow Mortality 0-100% (2%) Mortality improvement (10%)-10% (3%) Liabilities: Interest sensitive contract liabilities- embedded derivatives- indexed annuities 925,887 Discounted cash flow Mortality 0-100% (2%) Lapse 0-35% (7%) Withdrawal 0-5% (3%) Option budget projection 2-4% (3%) Interest sensitive contract liabilities- embedded derivatives- variable annuities 159,279 Discounted cash flow Mortality 0-100% (2%) Lapse 0-25% (8%) Withdrawal 0-7% (3%) CVA 0-5% (1%) Long-term volatility 0-27% (11%) Mortality swaps 797 Discounted cash flow Mortality 0-100% (1%) The Company recognizes transfers of assets and liabilities into and out of levels within the fair value hierarchy at the beginning of the quarter in which the actual event or change in circumstances that caused the transfer occurs. Assets and liabilities transferred into Level 3 are due to a lack of observable market transactions and price information. Assets and liabilities are transferred out of Level 3 when circumstances change such that significant inputs can be corroborated with market observable data. This may be due to a significant increase in market activity for the asset or liability, a specific event, one or more significant input(s) becoming observable. Transfers out of Level 3 were primarily the result of the Company using observable pricing information or a third party pricing quotation that appropriately reflects the fair value of those assets and liabilities. In addition, certain transfers ou

Segment Information

Segment Information	6 Months Ended
	Jun. 30, 2015
Segment Reporting [Abstract]
Segment Information	Segment Information Effective January 1, 2015, the Company further refined its reporting of the Canada; Europe, Middle East and Africa; and Asia Pacific segments into traditional and non-traditional businesses to reflect the expanded product offerings within its geographic-based segments. The Company’s traditional and non-traditional segments are now managed separately and have discrete financial information available that is reviewed regularly by the Company’s chief operating decision maker. The Company has recently experienced growth and opportunity in its non-traditional businesses resulting from its efforts to meet the needs of its clients and adapt to the changing regulatory environment within the insurance industry. The non-traditional business primarily consists of asset-intensive, longevity, financial reinsurance and capital motivated transactions that are sourced and managed by the Company’s Global Financial Solutions unit. The prior period presentation has been adjusted to conform to the new segment reporting structure. The accounting policies of the segments are the same as those described in the Summary of Significant Accounting Policies in Note 2 of the consolidated financial statements accompanying the 2014 Annual Report. The Company measures segment performance primarily based on profit or loss from operations before income taxes. There are no intersegment reinsurance transactions and the Company does not have any material long-lived assets. Investment income is allocated to the segments based upon average assets and related capital levels deemed appropriate to support the segment business volumes. The Company allocates capital to its segments based on an internally developed economic capital model, the purpose of which is to measure the risk in the business and to provide a basis upon which capital is deployed. The economic capital model considers the unique and specific nature of the risks inherent in the Company’s businesses. As a result of the economic capital allocation process, a portion of investment income and investment related gains and losses are attributed to the segments based on the level of allocated capital. In addition, the segments are charged for excess capital utilized above the allocated economic capital basis. This charge is included in policy acquisition costs and other insurance expenses. The Company’s reportable segments are strategic business units that are primarily segregated by geographic region. Information related to revenues, income (loss) before income taxes and total assets of the Company for each reportable segment are summarized below (dollars in thousands). Three months ended June 30, Six months ended June 30, Total revenues: 2015 2014 2015 2014 U.S. and Latin America: Traditional $ 1,342,248 $ 1,333,027 $ 2,597,538 $ 2,611,719 Non-Traditional 191,775 293,448 384,448 582,069 Total 1,534,023 1,626,475 2,981,986 3,193,788 Canada: Traditional 270,090 301,401 535,094 572,845 Non-Traditional 11,458 7,712 23,332 14,017 Total 281,548 309,113 558,426 586,862 Europe, Middle East and Africa: Traditional 284,192 307,100 579,424 614,850 Non-Traditional 75,308 84,218 130,684 142,325 Total 359,500 391,318 710,108 757,175 Asia Pacific: Traditional 411,314 465,538 805,189 852,427 Non-Traditional 7,076 17,633 26,646 45,773 Total 418,390 483,171 831,835 898,200 Corporate and Other 36,879 22,943 68,598 54,168 Total $ 2,630,340 $ 2,833,020 $ 5,150,953 $ 5,490,193 Three months ended June 30, Six months ended June 30, Income (loss) before income taxes: 2015 2014 2015 2014 U.S. and Latin America: Traditional $ 82,793 $ 93,988 $ 100,636 $ 144,960 Non-Traditional 70,393 95,474 124,898 178,598 Total 153,186 189,462 225,534 323,558 Canada: Traditional 22,736 32,009 45,463 51,442 Non-Traditional 3,094 3,011 7,225 3,642 Total 25,830 35,020 52,688 55,084 Europe, Middle East and Africa: Traditional 9,159 26,787 19,641 25,795 Non-Traditional 31,432 34,535 51,066 50,732 Total 40,591 61,322 70,707 76,527 Asia Pacific: Traditional 4,315 28,213 56,963 47,080 Non-Traditional (1,405 ) 6,715 8,740 14,159 Total 2,910 34,928 65,703 61,239 Corporate and Other (8,727 ) (20,197 ) (16,717 ) (16,433 ) Total $ 213,790 $ 300,535 $ 397,915 $ 499,975 Total Assets: June 30, 2015 December 31, 2014 U.S. and Latin America: Traditional $ 15,904,747 $ 14,159,824 Non-Traditional 13,854,077 11,572,251 Total 29,758,824 25,732,075 Canada: Traditional 3,805,372 3,946,942 Non-Traditional 25,348 49,186 Total 3,830,720 3,996,128 Europe, Middle East and Africa: Traditional 2,586,327 2,514,868 Non-Traditional 2,064,621 2,178,454 Total 4,650,948 4,693,322 Asia Pacific: Traditional 2,997,342 2,951,723 Non-Traditional 625,125 667,645 Total 3,622,467 3,619,368 Corporate and Other 5,597,312 6,638,718 Total $ 47,460,271 $ 44,679,611

Commitments and Contingent Liab

Commitments and Contingent Liabilities	6 Months Ended
	Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	Commitments, Contingencies and Guarantees Commitments Funding of Investments The Company's commitments to fund investments as of June 30, 2015 and December 31, 2014 are presented in the following table (dollars in thousands): June 30, 2015 December 31, 2014 Limited partnerships $ 240,386 $ 254,314 Commercial mortgage loans 7,100 33,850 Private placements 3,300 — Bank loans 52,467 52,859 Equity release mortgages 8,383 8,549 The Company anticipates that the majority of its current commitments will be invested over the next five years; however, these commitments could become due any time at the request of the counterparties. Investments in limited partnerships and private placements are carried at cost or reported using the equity method and included in other invested assets in the condensed consolidated balance sheets. Bank loans are carried at fair value and included in fixed maturities available-for-sale. Equity release mortgages are carried at unpaid principal balances, net of any amortized premium or discount and valuation allowance and included in other invested assets. Letters of Credit The Company has obtained bank letters of credit in favor of various affiliated and unaffiliated insurance companies from which the Company assumes business. These letters of credit represent guarantees of performance under the reinsurance agreements and allow ceding companies to take statutory reserve credits. Certain of these letters of credit contain financial covenant restrictions. At June 30, 2015 and December 31, 2014 , there were approximately $147.2 million and $176.5 million , respectively, of undrawn outstanding bank letters of credit in favor of third parties. Additionally, the Company utilizes letters of credit primarily to secure reserve credits when it retrocedes business to its affiliated subsidiaries. The Company cedes business to its affiliates to help reduce the amount of regulatory capital required in certain jurisdictions such as the U.S. and the United Kingdom. The capital required to support the business in the affiliates reflects a more realistic estimate of capital needed to back the related business. As of June 30, 2015 and December 31, 2014 , $1,159.5 million and $1,035.0 million , respectively, in undrawn letters of credit from various banks were outstanding, primarily backing reinsurance between the various subsidiaries of the Company. The banks providing letters of credit to the Company are included on the National Association of Insurance Commissioners (“NAIC”) list of approved banks. The Company maintains eight credit facilities, a syndicated revolving credit facility with a capacity of $850.0 million , and seven letter of credit facilities with a combined capacity of $806.7 million . The Company may borrow cash and obtain letters of credit in multiple currencies under its syndicated revolving credit facility. The following table provides additional information on the Company’s credit facilities as of June 30, 2015 and December 31, 2014 (dollars in thousands): Amount Utilized (1) Facility Capacity Maturity Date June 30, 2015 December 31, 2014 Basis of Fees $ 850,000 September 2019 $ 401,856 $ 204,774 Senior unsecured long-term debt rating 76,310 (2) November 2015 76,310 74,623 Fixed 120,000 May 2016 80,040 80,040 Fixed 38,535 (2) May 2016 26,975 28,612 Fixed 150,000 June 2016 130,000 130,000 Fixed 100,000 June 2017 76,029 81,747 Fixed 270,000 November 2017 270,000 270,000 Fixed 51,892 (2) March 2019 51,892 80,961 Fixed (1) Represents issued but undrawn letters of credit. There was no cash borrowed for the periods presented. (2) Foreign currency facility, amounts presented are in U.S. dollars. Contingencies Litigation The Company is subject to litigation in the normal course of its business. A legal reserve is established when the Company is notified of an arbitration demand or litigation or is notified that an arbitration demand or litigation is imminent, it is probable that the Company will incur a loss as a result and the amount of the probable loss is reasonably capable of being estimated. Other In addition, the Company indemnifies its directors and officers as provided in its charters and by-laws. Since this indemnity generally is not subject to limitation with respect to duration or amount, the Company does not believe that it is possible to determine the maximum potential amount due under this indemnity in the future. Guarantees RGA has issued guarantees to third parties on behalf of its subsidiaries for the payment of amounts due under certain securities borrowing arrangements, financing arrangements and office lease obligations, whereby, if a subsidiary fails to meet an obligation, RGA or one of its other subsidiaries will make a payment to fulfill the obligation. Additionally, in limited circumstances, treaty guarantees are granted to ceding companies in order to provide them additional security, particularly in cases where RGA’s subsidiary is relatively new, unrated, or not of a significant size, relative to the ceding company. Liabilities supported by the treaty guarantees, before consideration for any legally offsetting amounts due from the guaranteed party are reflected on the Company’s condensed consolidated balance sheets in future policy benefits. Potential guaranteed amounts of future payments will vary depending on production levels and underwriting results. Guarantees related to borrowed securities provide additional security to third parties should a subsidiary fail to return the borrowed securities when due. RGA’s guarantees issued as of June 30, 2015 and December 31, 2014 are reflected in the following table (dollars in thousands): June 30, 2015 December 31, 2014 Treaty guarantees $ 790,455 $ 826,496 Treaty guarantees, net of assets in trust 646,422 664,913 Borrowed securities 275,060 201,050 Financing arrangements 100,000 100,000 Lease obligations 5,245 6,085 RGA, through wholly-owned subsidiaries, has committed to provide statutory reserve support to third parties, in exchange for a fee, by funding loans if certain defined events occur. Such statutory reserves are required under the U.S. Valuation of Life Policies Model Regulation (commonly referred to as Regulation XXX for term life insurance policies and Regulation A-XXX for universal life secondary guarantees). The third parties have recourse to RGA should the subsidiary fail to provide the required funding, however, as of June 30, 2015 , the Company does not believe that it will be required to provide any funding under these commitments as the occurrence of the defined events is considered remote. The following table presents the maximum potential obligation for these commitments as of June 30, 2015 (dollars in millions): Commitment Period June 30, 2015 2023 $ 500 2033 950 2034 3,000 2035 500 2036 1,432 In addition, the Company indemnifies its directors and officers as provided in its charters and by-laws. Since this indemnity generally is not subject to limitation with respect to duration or amount, the Company does not believe that it is possible to determine the maximum potential amount due under this indemnity in the future.

Income Tax Income Tax

Income Tax Income Tax	6 Months Ended
	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	Income Tax Provision for income tax expense differed from the amounts computed by applying the U.S. federal income tax statutory rate of 35% to pre-tax income as a result of the following for the three and six months ended June 30, 2015 and 2014 (dollars in thousands): Three months ended June 30, Six months ended June 30, 2015 2014 2015 2014 Tax provision at U.S. statutory rate $ 74,826 $ 105,187 $ 139,270 $ 174,991 Increase (decrease) in income taxes resulting from: Foreign tax rate differing from U.S. tax rate (764 ) (4,676 ) (6,285 ) (7,896 ) Differences in tax bases in foreign jurisdictions (6,931 ) (3,564 ) (13,601 ) (3,314 ) Deferred tax valuation allowance 4,967 2,510 11,758 (647 ) Amounts related to tax audit contingencies 952 778 1,905 1,556 Subpart F 11,452 3,691 17,886 6,129 Foreign tax credits (1,104 ) (1,155 ) (3,448 ) (2,010 ) Return to provision adjustments (212 ) 114 (4,977 ) (3,237 ) Other, net 213 (646 ) (98 ) (557 ) Total provision for income taxes $ 83,399 $ 102,239 $ 142,410 $ 165,015 Effective tax rate 39.0 % 34.0 % 35.8 % 33.0 % The second quarter and first six months of 2015 effective tax rates were higher than the U.S. Statutory rate of 35.0% primarily as a result of a tax accrual related to the Active Financing Exception ("AFE") business extender provision that the U.S. Congress did not pass prior to the end of the quarter and a loss in Australia which has a lower tax rate than the U.S. The high rate was partially offset with income in other jurisdictions with rates lower than the U.S. The second quarter and first six months of 2014 effective tax rates were lower than the U.S. Statutory rate of 35.0% primarily as a result of income in non-U.S. jurisdictions with lower tax rates than the U.S., and the release of a valuation allowance in the first quarter on tax benefits associated with claims experience on certain treaties, which were partially offset by a tax accrual related to the AFE business extender provision that the U.S. Congress did not pass prior to the end of the quarter.

Employee Benefit Plans

Employee Benefit Plans	6 Months Ended
	Jun. 30, 2015
Compensation and Retirement Disclosure [Abstract]
Employee Benefit Plans	Employee Benefit Plans The components of net periodic benefit costs for the three and six months ended June 30, 2015 and 2014 were as follows (dollars in thousands): Pension Benefits Other Benefits Three months ended June 30, Three months ended June 30, 2015 2014 2015 2014 Service cost $ 2,586 $ 2,489 $ 589 $ 470 Interest cost 1,283 1,487 491 339 Expected return on plan assets (1,331 ) (1,302 ) — — Amortization of prior service cost 80 216 — — Amortization of prior actuarial loss 833 245 265 217 Net periodic benefit cost $ 3,451 $ 3,135 $ 1,345 $ 1,026 Pension Benefits Other Benefits Six months ended June 30, Six months ended June 30, 2015 2014 2015 2014 Service cost $ 4,616 $ 3,990 $ 1,178 $ 940 Interest cost 2,526 2,295 982 677 Expected return on plan assets (2,449 ) (2,235 ) — — Amortization of prior service cost 163 218 — — Amortization of prior actuarial loss 1,272 918 530 434 Net periodic benefit cost $ 6,128 $ 5,186 $ 2,690 $ 2,051 The Company has made $4.0 million in pension contributions during the first six months of 2015, and does not expect to make any additional pension contributions in 2015.

Equity Based Compensation

Equity Based Compensation	6 Months Ended
	Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Equity Based Compensation	Equity Based Compensation Equity compensation expense was $3.1 million and $6.4 million in the second quarter of 2015 and 2014 , respectively. In the first quarter of 2015, the Company granted 0.3 million stock appreciation rights at $90.06 weighted average exercise price per share and 0.2 million performance contingent units to employees. Additionally, non-employee directors were granted a total of 15,174 shares of common stock. As of June 30, 2015 , 1.8 million share options at a weighted average strike price per share of $53.26 were vested and exercisable, with a remaining weighted average exercise period of 4.9 years. As of June 30, 2015 , the total compensation cost of non-vested awards not yet recognized in the condensed consolidated financial statements was $36.6 million . It is estimated that these costs will vest over a weighted average period of 2.1 years.

Retrocession Arrangements and R

Retrocession Arrangements and Reinsurance Ceded Receivables	6 Months Ended
	Jun. 30, 2015
Retrocession Arrangements And Reinsurance Ceded Receivables [Abstract]
Retrocession Arrangements and Reinsurance Ceded Receivables	Retrocession Arrangements and Reinsurance Ceded Receivables The Company generally reports retrocession activity on a gross basis. Amounts paid or deemed to have been paid for reinsurance are reflected in reinsurance ceded receivables. The cost of reinsurance related to long-duration contracts is recognized over the terms of the reinsured policies on a basis consistent with the reporting of those policies. Retrocession reinsurance treaties do not relieve the Company from its obligations to direct writing companies. Failure of retrocessionaires to honor their obligations could result in losses to the Company. Consequently, allowances would be established for amounts deemed uncollectible. At June 30, 2015 and December 31, 2014 , no allowances were deemed necessary. The Company regularly evaluates the financial condition of the insurance companies from which it assumes and to which it cedes reinsurance. Retrocessions are arranged through the Company’s retrocession pools for amounts in excess of the Company’s retention limit. As of June 30, 2015 and December 31, 2014 , all rated retrocession pool participants followed by the A.M. Best Company were rated “A- (excellent)” or better. The Company verifies retrocession pool participants’ ratings on a quarterly basis. For a majority of the retrocessionaires that were not rated, security in the form of letters of credit or trust assets has been given as additional security. In addition, the Company performs annual financial reviews of its retrocessionaires to evaluate financial stability and performance. In addition to its third party retrocessionaires, various RGA reinsurance subsidiaries retrocede amounts in excess of their retention to affiliated subsidiaries. The following table presents information for the Company's reinsurance ceded receivable assets, including the respective amount and A.M. Best rating for each reinsurer representing in excess of five percent of the total as of June 30, 2015 and December 31, 2014 (dollars in thousands): June 30, 2015 December 31, 2014 Reinsurer A.M. Best Rating Amount % of Total Amount % of Total Reinsurer A A+ $ 201,915 28.4 % $ 210,996 36.5 % Reinsurer B A+ 193,294 27.2 45,541 7.9 Reinsurer C A+ 73,148 10.3 74,412 12.9 Reinsurer D A 45,464 6.4 43,818 7.6 Reinsurer E A++ 43,679 6.1 43,154 7.5 Other reinsurers 153,963 21.6 160,285 27.6 Total $ 711,463 100.0 % $ 578,206 100.0 % Included in the total reinsurance ceded receivables balance were $260.1 million and $143.0 million of claims recoverable, of which $19.6 million and $10.9 million were in excess of 90 days past due, as of June 30, 2015 and December 31, 2014 , respectively. The increase in the Company's reinsurance ceded receivable and claims recoverable are due to a large retrocession transaction with Reinsurer B, as reflected in the table above.

Stock Transactions

Stock Transactions	6 Months Ended
	Jun. 30, 2015
Equity [Abstract]
Stock Transactions	Stock Transactions On January 22, 2015, RGA’s board of directors authorized a share repurchase program, with no expiration date, for up to $300.0 million of the RGA’s outstanding common stock. In connection with this authorization, the board of directors terminated the stock repurchase authority granted in 2014. In July 2015, RGA’s board of directors authorized an additional increase of $150.0 million to the share repurchase program previously authorized in January 2015. With these authorizations, the total amount of the Company’s outstanding common stock authorized for repurchase is $450.0 million . During the first quarter of 2015, RGA repurchased 2,538,718 shares of common stock under this program for $230.1 million . The common shares repurchased have been placed into treasury to be used for general corporate purposes. During the second quarter of 2015, RGA repurchased 252,642 shares of common stock under this program for $23.5 million . As of June 30, 2015 there was $46.4 million remaining under the share repurchase authorization, which does not reflect the additional $150.0 million authorization approved by RGA’s board of directors in July 2015.

Acquisition

Acquisition	6 Months Ended
	Jun. 30, 2015
Supplemental Cash Flow Elements [Abstract]
Cash Flow, Supplemental Disclosures [Text Block]	Acquisition On April 1, 2015, the Company completed the acquisition of 100% of Aurora National Life Assurance Company’s stock (“Aurora”) from Swiss Re Life & Health America, Inc. ("Swiss Re") pursuant to the stock purchase agreement dated October 20, 2014, between the Company and Swiss Re. The transaction represented an opportunity to deploy capital into a seasoned closed block of business in the U.S. market. The total cash purchase price was $191.5 million , net of cash acquired. Total assets acquired were $3.7 billion , primarily consisting of $3.6 billion of investments, and total liabilities assumed were $3.5 billion . There is no goodwill, including tax deductible goodwill, associated with the acquisition. The business acquired will be recorded in the U.S. and Latin America Traditional and Non-Traditional segments. This acquisition did not have a material impact on the Company's condensed consolidated financial statements, and as a result no proforma disclosures have been presented.

Financing Activities

Financing Activities	6 Months Ended
	Jun. 30, 2015
Financing Activities [Abstract]
Financing Receivables [Text Block]	Financing Activities In May 2015, RGA’s subsidiary, RGA Reinsurance Company (Barbados) Ltd. (“RGA Barbados”) obtained CAD $200.0 million of collateral financing from a third party through 2020, enabling RGA Barbados to support collateral requirements for Canadian reinsurance transactions. The obligation is reflected on the condensed consolidated balance sheets in collateral finance and securitization notes. Interest on the collateral financing is payable quarterly and accrues at 3-month Canadian Dealer Offered Rate plus a margin and is reflected on the condensed consolidated statements of income in collateral finance and securitization expense.

New Accounting Standards

New Accounting Standards	6 Months Ended
	Jun. 30, 2015
Accounting Changes and Error Corrections [Abstract]
New Accounting Standards	New Accounting Standards Changes to the general accounting principles are established by the Financial Accounting Standards Board ("FASB") in the form of accounting standards updates to the FASB Accounting Standards Codification™. Accounting standards updates not listed below were assessed and determined to be either not applicable or are expected to have minimal impact on the Company’s condensed consolidated financial statements. Adoption of New Accounting Standards Income Taxes In July 2013, the FASB amended the general accounting principles for Income Taxes as it relates to the presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. This amendment clarifies that an unrecognized tax benefit should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward. However, to the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available to settle any additional income taxes that would result from the disallowance of a tax position or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and not combined with deferred tax assets. These amendments are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. The adoption of this amendment did not have an impact on the Company's condensed consolidated financial statements. Transfers and Servicing In June 2014, the FASB amended the general accounting principles for Transfers and Servicing as it relates to the accounting for repurchase-to-maturity transactions, repurchase financings, and disclosures. This amendment requires entities to account for repurchase-to-maturity transactions as secured borrowings, eliminates guidance on linked repurchase financing transactions, and expands disclosure requirements related to certain transfers of financial assets that are accounted for as sales and certain transfers accounted for as secured borrowings. These amendments are effective for annual years, and interim periods within those years, beginning after December 15, 2014. Certain interim period disclosures for repurchase agreements and securities lending transactions are not required until the second quarter of 2015. The adoption of this amendment did not have an impact on the Company's condensed consolidated financial statements other than the addition of the required disclosures. Future Adoption of New Accounting Standards Compensation In June 2014, the FASB amended the general accounting principles for Compensation as it relates to the accounting for share-based payments when the terms of an award provide that a performance target could be achieved after the requisite service period. This amendment requires that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. The amendment further clarifies that the performance target should not be reflected in estimating the grant-date fair value of the award and that compensation cost should be recognized in the period in which it becomes probable that the performance target will be achieved. These amendments are effective for annual years, and interim periods within those years, beginning after December 15, 2015. The Company is currently evaluating the impact of this amendment on its condensed consolidated financial statements. Consolidation In February 2015, the FASB amended the general accounting principle for Consolidation , effective for fiscal years beginning after December 15, 2015 and interim periods within those years and early adoption is permitted. The new standard is intended to improve targeted areas of the consolidation guidance for legal entities such as limited partnerships, limited liability corporations, and securitization structures. The amendments affect the consolidation evaluation for reporting organizations. In addition, the amendments simplify and improve current GAAP by reducing the number of consolidation models. The Company is currently evaluating the impact of this guidance on its condensed consolidated financial statements. Debt Issuance Costs In April 2015, the FASB amended the general accounting principle related to the presentation of Debt Issuance Costs . The amendments in this update require that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The recognition and measurement guidance for debt issuance costs are not affected by the amendments in this update. These amendments are effective for financial statements issued for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. The adoption of this amendment is not expected to have a material impact on the Company’s condensed consolidated financial statements. Fair Value Measurement In May 2015, the FASB amended the general accounting principle for Fair Value Measurement to remove the requirement to categorize within the fair value hierarchy all investments for which fair value is measured using the net asset value per share practical expedient. The amendments also remove the requirement to make certain disclosures for all investments that are eligible to be measured at fair value using the net asset value per share practical expedient. This ASU is effective for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years and which should be applied retrospectively to all periods presented. The Company is currently evaluating the impact of this guidance on its consolidated financial statements. Financial Services - Insurance In May 2015, the FASB issued Accounting Standards Update (ASU) 2015-09, Disclosures About Short-Duration Contracts , which expanded the breadth of disclosures that an insurance entity must provide about its short-duration insurance contracts. This ASU requires insurance entities to disclose for annual reporting periods information about the liability for unpaid claims and claim adjustment expenses. The ASU also requires insurance entities to disclose information about significant changes in methodologies and assumptions used to calculate the liability for unpaid claims and claim adjustment expenses, including reasons for the change and the effects on the financial statements. In addition, the ASU requires insurance entities to disclose for annual and interim reporting periods a roll-forward of the liability for unpaid claims and claim adjustment expenses. This ASU focuses only on disclosure; it does not change the accounting model for short-duration contracts. The ASU is effective for annual periods beginning after December 15, 2015, and interim periods within annual periods beginning after December 15, 2016. The adoption of this amendment is not expected to have an impact on the Company's consolidated financial statements other than the addition of the required disclosures.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2015
Earnings Per Share [Abstract]
Schedule Of Earnings Per Share Basic And Diluted By Common Class [Text Block]	The following table sets forth the computation of basic and diluted earnings per share on net income (in thousands, except per share information): Three months ended June 30, Six months ended June 30, 2015 2014 2015 2014 Earnings: Net income (numerator for basic and diluted calculations) $ 130,391 $ 198,296 $ 255,505 $ 334,960 Shares: Weighted average outstanding shares (denominator for basic calculation) 66,351 69,076 67,246 69,823 Equivalent shares from outstanding stock options 769 642 785 666 Denominator for diluted calculation 67,120 69,718 68,031 70,489 Earnings per share: Basic $ 1.97 $ 2.87 $ 3.80 $ 4.80 Diluted $ 1.94 $ 2.84 $ 3.76 $ 4.75

Accumulated Other Comprehensi24

Accumulated Other Comprehensive Income (Tables)	6 Months Ended
	Jun. 30, 2015
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Components of Accumulated Other Comprehensive Income	The balance of and changes in each component of accumulated other comprehensive income (loss) (“AOCI”) for the six months ended June 30, 2015 and 2014 are as follows (dollars in thousands): Accumulated Other Comprehensive Income (Loss), Net of Income Tax Accumulated Currency Translation Adjustments Unrealized Appreciation (Depreciation) of Investments (1) Pension and Postretirement Benefits Total Balance, December 31, 2014 $ 81,847 $ 1,624,773 $ (49,491 ) $ 1,657,129 Other comprehensive income (loss) before reclassifications (89,220 ) (612,314 ) 733 (700,801 ) Deferred income tax benefit (expense) (6,616 ) 204,252 (222 ) 197,414 Other comprehensive income (loss) before reclassifications, net of income tax (95,836 ) (408,062 ) 511 (503,387 ) Amounts reclassified to (from) AOCI — (6,192 ) 1,965 (4,227 ) Deferred income tax benefit (expense) — 537 (688 ) (151 ) Amounts reclassified to (from) AOCI, net of income tax — (5,655 ) 1,277 (4,378 ) Balance, June 30, 2015 $ (13,989 ) $ 1,211,056 $ (47,703 ) $ 1,149,364 Accumulated Other Comprehensive Income (Loss), Net of Income Tax Accumulated Currency Translation Adjustments Unrealized Appreciation (Depreciation) of Investments (1) Pension and Postretirement Benefits Total Balance, December 31, 2013 $ 207,083 $ 820,245 $ (21,721 ) $ 1,005,607 Other comprehensive income (loss) before reclassifications (9,162 ) 949,650 (257 ) 940,231 Deferred income tax benefit (expense) 9,122 (302,873 ) 251 (293,500 ) Other comprehensive income (loss) before reclassifications, net of income tax (40 ) 646,777 (6 ) 646,731 Amounts reclassified to (from) AOCI — (37,661 ) 1,570 (36,091 ) Deferred income tax benefit (expense) — 12,963 (550 ) 12,413 Amounts reclassified to (from) AOCI, net of income tax — (24,698 ) 1,020 (23,678 ) Balance, June 30, 2014 $ 207,043 $ 1,442,324 $ (20,707 ) $ 1,628,660 (1) Includes cash flow hedges. See Note 5 - “Derivative Instruments” for additional information on cash flow hedges.
Reclassification Out Of Accumulated Other Comprehensive Income	The following table presents the amounts of AOCI reclassifications for the three and six months ended June 30, 2015 and 2014 (dollars in thousands): Amount Reclassified from AOCI Three months ended June 30, Six months ended June 30, Details about AOCI Components 2015 2014 2015 2014 Affected Line Item in Statement of Income Unrealized gains and losses on available-for-sale securities $ 1,829 $ 27,142 $ 4,908 $ 28,331 Investment related gains (losses), net Gains and losses on cash flow hedges 543 321 603 539 Investment income Gains and losses on cash flow hedges 1,495 — 655 — Investment related gains (losses), net Deferred policy acquisition costs attributed to unrealized gains and losses (1) (4,307 ) 4,370 26 8,791 Total (440 ) 31,833 6,192 37,661 Provision for income taxes (245 ) (11,059 ) (537 ) (12,963 ) Net unrealized gains (losses), net of tax $ (685 ) $ 20,774 $ 5,655 $ 24,698 Amortization of unrealized pension and postretirement benefits: Prior service cost (2) $ (80 ) $ (216 ) $ (163 ) $ (218 ) Actuarial gains/(losses) (2) (1,098 ) (462 ) (1,802 ) (1,352 ) Total (1,178 ) (678 ) (1,965 ) (1,570 ) Provision for income taxes 413 238 688 550 Amortization of unrealized pension and postretirement benefits, net of tax $ (765 ) $ (440 ) $ (1,277 ) $ (1,020 ) Total reclassifications, net of tax $ (1,450 ) $ 20,334 $ 4,378 $ 23,678 (1) This AOCI component is included in the computation of the deferred policy acquisition cost. See Note 8 – “Deferred Policy Acquisition Costs” of the 2014 Annual Report for additional details. (2) These AOCI components are included in the computation of the net periodic pension cost. See Note 10 – “Employee Benefit Plans” for additional details.

Investments (Tables)

Investments (Tables)	6 Months Ended
	Jun. 30, 2015
Investments [Abstract]
Available For Sale Securities	The following tables provide information relating to investments in fixed maturity and equity securities by sector as of June 30, 2015 and December 31, 2014 (dollars in thousands): June 30, 2015: Amortized Unrealized Unrealized Estimated Fair % of Other-than- Cost Gains Losses Value Total in AOCI Available-for-sale: Corporate securities $ 16,000,887 $ 730,409 $ 241,890 $ 16,489,406 58.8 % $ — Canadian and Canadian provincial governments 2,655,763 1,140,904 2,860 3,793,807 13.5 — Residential mortgage-backed securities 1,154,732 47,241 11,094 1,190,879 4.2 (300 ) Asset-backed securities 1,051,093 19,915 8,384 1,062,624 3.8 354 Commercial mortgage-backed securities 1,471,419 63,699 9,649 1,525,469 5.4 (1,609 ) U.S. government and agencies 1,332,518 18,149 86,669 1,263,998 4.5 — State and political subdivisions 478,262 38,891 10,981 506,172 1.8 — Other foreign government, supranational and foreign government-sponsored enterprises 2,160,658 88,674 17,712 2,231,620 8.0 — Total fixed maturity securities $ 26,305,332 $ 2,147,882 $ 389,239 $ 28,063,975 100.0 % $ (1,555 ) Non-redeemable preferred stock $ 91,717 $ 2,477 $ 3,620 $ 90,574 70.9 % Other equity securities 37,642 434 982 37,094 29.1 Total equity securities $ 129,359 $ 2,911 $ 4,602 $ 127,668 100.0 % December 31, 2014: Amortized Unrealized Unrealized Estimated Fair % of Other-than- Cost Gains Losses Value Total in AOCI Available-for-sale: Corporate securities $ 14,010,604 $ 965,523 $ 90,544 $ 14,885,583 58.4 % $ — Canadian and Canadian provincial governments 2,668,852 1,196,420 7 3,865,265 15.2 — Residential mortgage-backed securities 991,867 52,640 6,611 1,037,896 4.1 (300 ) Asset-backed securities 1,059,660 20,301 10,375 1,069,586 4.2 354 Commercial mortgage-backed securities 1,453,657 87,593 8,659 1,532,591 6.0 (1,609 ) U.S. government and agencies 501,352 25,014 515 525,851 2.0 — State and political subdivisions 378,457 51,117 3,498 426,076 1.7 — Other foreign government, supranational and foreign government-sponsored enterprises 2,041,148 110,065 13,089 2,138,124 8.4 — Total fixed maturity securities $ 23,105,597 $ 2,508,673 $ 133,298 $ 25,480,972 100.0 % $ (1,555 ) Non-redeemable preferred stock $ 93,540 $ 7,350 $ 1,527 $ 99,363 78.3 % Other equity securities 26,994 597 94 27,497 21.7 Total equity securities $ 120,534 $ 7,947 $ 1,621 $ 126,860 100.0 %
Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block]	The following table includes fixed maturity securities pledged and received as collateral, and assets in trust held to satisfy collateral requirements under certain third-party reinsurance treaties as of June 30, 2015 and December 31, 2014 (dollars in thousands): June 30, 2015 December 31, 2014 Amortized Cost Estimated Fair Value Amortized Cost Estimated Fair Value Fixed maturity securities pledged as collateral $ 181,681 $ 190,298 $ 127,229 $ 134,863 Fixed maturity securities received as collateral n/a 126,422 n/a 117,227 Securities held in trust 9,948,045 10,501,206 10,197,489 10,922,947
Concentration Risk Disclosure [Text Block]	The Company’s exposure to concentrations of credit risk of single issuers greater than 10% of the Company’s stockholders’ equity included securities of the U.S. government and its agencies as of June 30, 2015, as well as the securities disclosed below as of June 30, 2015 and December 31, 2014 (dollars in thousands). June 30, 2015 December 31, 2014 Amortized Cost Estimated Fair Value Amortized Cost Estimated Fair Value Fixed maturity securities guaranteed or issued by: Canadian province of Ontario $ 921,150 $ 1,295,793 $ 979,908 $ 1,359,339 Canadian province of Quebec 1,012,835 1,560,409 1,006,315 1,599,673
Investments Classified By Contractual Maturity Date	The amortized cost and estimated fair value of fixed maturity securities available-for-sale at June 30, 2015 are shown by contractual maturity in the table below (dollars in thousands). Actual maturities can differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Asset and mortgage-backed securities are shown separately in the table below, as they are not due at a single maturity date. Amortized Cost Estimated Fair Value Available-for-sale: Due in one year or less $ 686,582 $ 696,191 Due after one year through five years 4,882,381 5,118,186 Due after five years through ten years 7,920,478 8,213,365 Due after ten years 9,138,647 10,257,261 Asset and mortgage-backed securities 3,677,244 3,778,972 Total $ 26,305,332 $ 28,063,975
Fixed Maturity Holdings Industry Types Weighted Average Credit Ratings [Table Text Block]	The tables below show the major industry types of the Company’s corporate fixed maturity holdings as of June 30, 2015 and December 31, 2014 (dollars in thousands): June 30, 2015: Estimated Amortized Cost Fair Value % of Total Finance $ 5,238,400 $ 5,419,421 32.9 % Industrial 9,057,282 9,281,262 56.2 Utility 1,705,205 1,788,723 10.9 Total $ 16,000,887 $ 16,489,406 100.0 % December 31, 2014: Estimated Amortized Cost Fair Value % of Total Finance $ 4,789,568 $ 5,066,408 34.0 % Industrial 7,639,330 8,086,067 54.3 Utility 1,581,706 1,733,108 11.7 Total $ 14,010,604 $ 14,885,583 100.0 %
RollForward Of Cumulative Credit Loss Component Of Otti Income Loss [Text Block]	The following table sets forth the amount of pre-tax credit loss impairments on fixed maturity securities held by the Company as of the dates indicated, for which a portion of the OTTI loss was recognized in AOCI, and the corresponding changes in such amounts (dollars in thousands): Three months ended June 30, Six months ended June 30, 2015 2014 2015 2014 Balance, beginning of period $ 7,284 $ 11,696 $ 7,284 $ 11,696 Credit loss OTTI previously recognized on securities which matured, paid down, prepaid or were sold during the period — (4,412 ) — (4,412 ) Balance, end of period $ 7,284 $ 7,284 $ 7,284 $ 7,284
Investments In Debt And Equity Securities Gross Unrealized Losses Disclosures	The following table presents the total gross unrealized losses for the 1,566 and 932 fixed maturity and equity securities as of June 30, 2015 and December 31, 2014 , respectively, where the estimated fair value had declined and remained below amortized cost by the indicated amount (dollars in thousands): June 30, 2015 December 31, 2014 Gross Unrealized Losses % of Total Gross Unrealized Losses % of Total Less than 20% $ 373,312 94.8 % $ 111,965 83.0 % 20% or more for less than six months 10,201 2.6 13,698 10.1 20% or more for six months or greater 10,328 2.6 9,256 6.9 Total $ 393,841 100.0 % $ 134,919 100.0 %
Fair Value And Investments In Debt And Marketable Equity Securities And Certain Trading Assets Disclosures	The following tables present the estimated fair values and gross unrealized losses, including other-than-temporary impairment losses reported in AOCI, for 1,566 and 932 fixed maturity and equity securities that have estimated fair values below amortized cost as of June 30, 2015 and December 31, 2014 , respectively (dollars in thousands). These investments are presented by class and grade of security, as well as the length of time the related fair value has remained below amortized cost. Less than 12 months 12 months or greater Total Gross Gross Gross June 30, 2015: Estimated Unrealized Estimated Unrealized Estimated Unrealized Fair Value Losses Fair Value Losses Fair Value Losses Investment grade securities: Corporate securities $ 4,719,168 $ 194,881 $ 299,379 $ 17,451 $ 5,018,547 $ 212,332 Canadian and Canadian provincial governments 117,996 2,860 — — 117,996 2,860 Residential mortgage-backed securities 309,772 6,659 64,855 3,772 374,627 10,431 Asset-backed securities 294,220 3,101 126,602 3,504 420,822 6,605 Commercial mortgage-backed securities 220,262 4,376 22,831 1,392 243,093 5,768 U.S. government and agencies 862,953 86,669 — — 862,953 86,669 State and political subdivisions 157,210 7,399 13,180 3,582 170,390 10,981 Other foreign government, supranational and foreign government-sponsored enterprises 402,345 13,050 33,829 1,988 436,174 15,038 Total investment grade securities 7,083,926 318,995 560,676 31,689 7,644,602 350,684 Below investment grade securities: Corporate securities 553,615 23,667 58,910 5,891 612,525 29,558 Residential mortgage-backed securities 31,443 268 11,779 395 43,222 663 Asset-backed securities 5,305 84 12,102 1,695 17,407 1,779 Commercial mortgage-backed securities 6,523 534 7,544 3,347 14,067 3,881 Other foreign government, supranational and foreign government-sponsored enterprises 62,974 2,502 3,921 172 66,895 2,674 Total below investment grade securities 659,860 27,055 94,256 11,500 754,116 38,555 Total fixed maturity securities $ 7,743,786 $ 346,050 $ 654,932 $ 43,189 $ 8,398,718 $ 389,239 Non-redeemable preferred stock $ 39,466 $ 2,178 $ 6,225 $ 1,442 $ 45,691 $ 3,620 Other equity securities 26,791 982 — — 26,791 982 Total equity securities $ 66,257 $ 3,160 $ 6,225 $ 1,442 $ 72,482 $ 4,602 Less than 12 months 12 months or greater Total Gross Gross Gross December 31, 2014: Estimated Unrealized Estimated Unrealized Estimated Unrealized Fair Value Losses Fair Value Losses Fair Value Losses Investment grade securities: Corporate securities $ 1,225,767 $ 27,784 $ 614,294 $ 30,040 $ 1,840,061 $ 57,824 Canadian and Canadian provincial governments — — 1,235 7 1,235 7 Residential mortgage-backed securities 78,864 846 135,414 5,247 214,278 6,093 Asset-backed securities 332,785 4,021 109,411 4,289 442,196 8,310 Commercial mortgage-backed securities 78,632 564 28,375 2,461 107,007 3,025 U.S. government and agencies 81,317 89 32,959 426 114,276 515 State and political subdivisions 13,780 17 18,998 3,438 32,778 3,455 Other foreign government, supranational and foreign government-sponsored enterprises 156,725 7,007 76,111 2,946 232,836 9,953 Total investment grade securities 1,967,870 40,328 1,016,797 48,854 2,984,667 89,182 Below investment grade securities: Corporate securities 415,886 29,316 32,567 3,404 448,453 32,720 Residential mortgage-backed securities 22,836 293 6,284 225 29,120 518 Asset-backed securities 12,448 274 7,108 1,791 19,556 2,065 Commercial mortgage-backed securities 3,288 249 5,580 5,385 8,868 5,634 State and political subdivisions 964 43 — — 964 43 Other foreign government, supranational and foreign government-sponsored enterprises 13,986 3,136 — — 13,986 3,136 Total below investment grade securities 469,408 33,311 51,539 10,805 520,947 44,116 Total fixed maturity securities $ 2,437,278 $ 73,639 $ 1,068,336 $ 59,659 $ 3,505,614 $ 133,298 Non-redeemable preferred stock $ 11,619 $ 235 $ 19,100 $ 1,292 $ 30,719 $ 1,527 Other equity securities — — 3,545 94 3,545 94 Total equity securities $ 11,619 $ 235 $ 22,645 $ 1,386 $ 34,264 $ 1,621
Investment Income	Major categories of investment income, net of related expenses, consist of the following (dollars in thousands): Three months ended June 30, Six months ended June 30, 2015 2014 2015 2014 Fixed maturity securities available-for-sale $ 303,792 $ 253,456 $ 573,560 $ 497,418 Mortgage loans on real estate 37,121 30,373 71,893 63,465 Policy loans 16,248 13,751 30,288 27,189 Funds withheld at interest 87,325 108,059 199,585 220,798 Short-term investments 814 80 1,509 1,045 Other invested assets 22,418 19,021 34,445 33,522 Investment income 467,718 424,740 911,280 843,437 Investment expense (17,179 ) (14,133 ) (33,850 ) (28,455 ) Investment income, net of related expenses $ 450,539 $ 410,607 $ 877,430 $ 814,982
Gain Loss On Investments	Investment related gains (losses), net consist of the following (dollars in thousands): Three months ended June 30, Six months ended June 30, 2015 2014 2015 2014 Fixed maturity and equity securities available for sale: Other-than-temporary impairment losses on fixed maturity securities recognized in earnings $ (4,137 ) $ (870 ) $ (6,664 ) $ (1,173 ) Gain on investment activity 20,009 34,887 39,210 42,954 Loss on investment activity (14,475 ) (6,877 ) (28,071 ) (13,460 ) Other impairment losses and change in mortgage loan provision 143 (5,309 ) (4,025 ) (3,645 ) Derivatives and other, net (17,718 ) 96,696 (9,045 ) 178,422 Total investment related gains (losses), net $ (16,178 ) $ 118,527 $ (8,595 ) $ 203,098
Schedule of Repurchase Agreements [Table Text Block]	The following table includes the amount of borrowed securities, repurchased securities pledged and repurchased/reverse repurchased securities pledged and received as of June 30, 2015 and December 31, 2014 (dollars in thousands). June 30, 2015 December 31, 2014 Amortized Cost Estimated Fair Value Amortized Cost Estimated Fair Value Borrowed securities $ 275,060 $ 284,602 $ 201,050 $ 212,946 Repurchase program securities pledged — — 92,446 107,158 Repurchase program/reverse repurchase program: Securities pledged 298,900 313,771 298,466 314,160 Securities received n/a 340,201 n/a 338,929
Schedule of Underlying Assets of Repurchase Agreements when Amount of Repurchase Agreements Exceeds 10 Percent of Assets [Table Text Block]	The following table presents information on the securities pledged as collateral by the Company related to its repurchase/reverse repurchase program as of June 30, 2015 (dollars in thousands). Collateral associated with certain borrowed securities is not included within the table as the collateral pledged to each counterparty is the right to reinsurance treaty cash flows. June 30, 2015 Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 Days 30-90 Days Greater than 90 Days Total Collateral on repurchase program U.S. treasury and agency securities $ — $ — $ 23,237 $ 177,294 $ 200,531 Residential mortgage-backed securities — — — 104,144 104,144 Other debt instruments 9,096 — — — 9,096 Total borrowings $ 9,096 $ — $ 23,237 $ 281,438 $ 313,771 Gross amount of recognized liabilities for repurchase agreement in preceding table $ 340,201 Amounts related to agreements not included in offsetting disclosure $ 26,430
Disclosure Of Real Estate Holdings By Property Type [Table Text Block]	The distribution of mortgage loans, gross of valuation allowances, by property type is as follows as of June 30, 2015 and December 31, 2014 (dollars in thousands): June 30, 2015 December 31, 2014 Property type: Recorded Investment % of Total Recorded % of Total Office building $ 957,724 31.1 % $ 851,749 31.3 % Retail 964,540 31.4 802,466 29.6 Industrial 535,856 17.4 466,583 17.2 Apartment 410,213 13.3 376,430 13.8 Other commercial 210,922 6.8 221,481 8.1 Total $ 3,079,255 100.0 % $ 2,718,709 100.0 %
Mortgage Loans Classified By Contractual Maturity Date [Table Text Block]	The maturities of the mortgage loans, gross of valuation allowances, as of June 30, 2015 and December 31, 2014 are as follows (dollars in thousands): June 30, 2015 December 31, 2014 Recorded Investment % of Total Recorded Investment % of Total Due within five years $ 877,270 28.5 % $ 860,362 31.6 % Due after five years through ten years 1,459,108 47.4 1,165,530 42.9 Due after ten years 742,877 24.1 692,817 25.5 Total $ 3,079,255 100.0 % $ 2,718,709 100.0 %
Mortgage Loan Internal Credit Risk Grade [Table Text Block]	Information regarding the Company’s credit quality indicators, as determined by the Company's internal evaluation methodology for its recorded investment in mortgage loans, gross of valuation allowances, as of June 30, 2015 and December 31, 2014 is as follows (dollars in thousands): June 30, 2015 December 31, 2014 Internal credit quality grade: Recorded Investment % of Total Recorded Investment % of Total High investment grade $ 1,553,149 50.5 % $ 1,326,199 48.8 % Investment grade 1,405,901 45.7 1,235,046 45.4 Average 81,284 2.6 118,152 4.4 Watch list 22,036 0.7 22,285 0.8 In or near default 16,885 0.5 17,027 0.6 Total $ 3,079,255 100.0 % $ 2,718,709 100.0 %
Recorded Investment And Allowance For Credit Losses	The following table presents the recorded investment in mortgage loans, by method of measuring impairment, and the related valuation allowances as of June 30, 2015 and December 31, 2014 (dollars in thousands): June 30, 2015 December 31, 2014 Mortgage loans: Individually measured for impairment $ 16,885 $ 17,027 Collectively measured for impairment 3,062,370 2,701,682 Mortgage loans, gross of valuation allowances 3,079,255 2,718,709 Valuation allowances: Individually measured for impairment 671 816 Collectively measured for impairment 5,271 5,655 Total valuation allowances 5,942 6,471 Mortgage loans, net of valuation allowances $ 3,073,313 $ 2,712,238
Allowance For Mortgage Loan And Lease Losses Provision For Loss Net	Information regarding the Company’s loan valuation allowances for mortgage loans for the three and six months ended June 30, 2015 and 2014 is as follows (dollars in thousands): Three months ended June 30, Six months ended June 30, 2015 2014 2015 2014 Balance, beginning of period $ 6,130 $ 8,466 $ 6,471 $ 10,106 Charge-offs, net of recoveries — — — 24 Provision (release) (188 ) 1,226 (529 ) (438 ) Balance, end of period $ 5,942 $ 9,692 $ 5,942 $ 9,692
Impaired Financing Receivables Table	Three months ended June 30, Six months ended June 30, 2015 2014 2015 2014 Balance, beginning of period $ 6,130 $ 8,466 $ 6,471 $ 10,106 Charge-offs, net of recoveries — — — 24 Provision (release) (188 ) 1,226 (529 ) (438 ) Balance, end of period $ 5,942 $ 9,692 $ 5,942 $ 9,692 Information regarding the portion of the Company’s mortgage loans that were impaired as of June 30, 2015 and December 31, 2014 is as follows (dollars in thousands): Unpaid Principal Balance Recorded Investment Related Allowance Carrying Value June 30, 2015: Impaired mortgage loans with no valuation allowance recorded $ 4,414 $ 4,354 $ — $ 4,354 Impaired mortgage loans with valuation allowance recorded 13,039 12,531 671 11,860 Total impaired mortgage loans $ 17,453 $ 16,885 $ 671 $ 16,214 December 31, 2014: Impaired mortgage loans with no valuation allowance recorded $ 7,314 $ 6,711 $ — $ 6,711 Impaired mortgage loans with valuation allowance recorded 10,279 10,316 816 9,500 Total impaired mortgage loans $ 17,593 $ 17,027 $ 816 $ 16,211 The Company’s average investment in impaired mortgage loans and the related interest income are reflected in the table below for the periods indicated (dollars in thousands): Three months ended June 30, 2015 2014 Average (1) Interest Income Average Recorded Investment (1) Interest Income Impaired mortgage loans with no valuation allowance recorded $ 5,524 $ 35 $ 14,589 $ 71 Impaired mortgage loans with valuation allowance recorded 11,397 229 15,855 259 Total impaired mortgage loans $ 16,921 $ 264 $ 30,444 $ 330 Six months ended June 30, 2015 2014 Average (1) Interest Income Average (1) Interest Income Impaired mortgage loans with no valuation allowance recorded $ 5,920 $ 141 $ 16,759 $ 389 Impaired mortgage loans with valuation allowance recorded 11,036 384 16,151 452 Total impaired mortgage loans $ 16,956 $ 525 $ 32,910 $ 841 (1) Average recorded investment represents the average loan balances as of the beginning of period and all subsequent quarterly end of period balanc
Schedule Of Other Invested Assets [Table Text Block]	Carrying values of these assets as of June 30, 2015 and December 31, 2014 are as follows (dollars in thousands): June 30, 2015 December 31, 2014 Equity securities $ 127,668 $ 126,860 Limited partnerships and real estate joint ventures 492,465 446,604 Structured loans 52,185 164,309 Derivatives 194,276 216,966 FVO contractholder-directed unit-linked investments 137,529 140,344 Other 105,984 103,236 Total other invested assets $ 1,110,107 $ 1,198,319

Derivative Instruments (Tables)

Derivative Instruments (Tables)	6 Months Ended
	Jun. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule Of Derivative Instruments In Statement Of Financial Position Fair Value	The following table presents the notional amounts and gross fair value of derivative instruments prior to taking into account the netting effects of master netting agreements as of June 30, 2015 and December 31, 2014 (dollars in thousands): June 30, 2015 December 31, 2014 Notional Carrying Value/Fair Value Notional Carrying Value/Fair Value Amount Assets Liabilities Amount Assets Liabilities Derivatives not designated as hedging instruments: Interest rate swaps $ 966,658 $ 71,399 $ 11,025 $ 1,144,661 $ 93,783 $ 3,934 Interest rate options — — — 240,000 18,195 — Financial futures 313,905 — — 275,983 — — Foreign currency forwards 60,000 129 7,551 67,967 87 15,098 Consumer price index swaps 39,537 34 57 41,938 — 561 Credit default swaps 891,700 11,757 3,937 805,700 11,689 3,502 Equity options 483,830 44,883 — 555,361 35,242 — Longevity swaps 891,760 10,853 — 450,000 7,727 — Mortality swaps 50,000 — 1,754 50,000 — 797 Synthetic guaranteed investment contracts 6,594,770 — — 6,500,942 — — Embedded derivatives in: Modified coinsurance or funds withheld arrangements — — 3,329 — 22,094 — Indexed annuity products — — 935,619 — — 925,887 Variable annuity products — — 133,535 — — 159,279 Total non-hedging derivatives 10,292,160 139,055 1,096,807 10,132,552 188,817 1,109,058 Derivatives designated as hedging instruments: Interest rate swaps 120,000 — 23,662 120,000 — 18,228 Foreign currency swaps 715,641 88,303 413 676,972 70,906 — Forward bond purchase commitments — — — 196,452 1,175 14,545 Total hedging derivatives 835,641 88,303 24,075 993,424 72,081 32,773 Total derivatives $ 11,127,801 $ 227,358 $ 1,120,882 $ 11,125,976 $ 260,898 $ 1,141,831
Offsetting Assets And Liabilities	The following table provides information relating to the Company’s derivative instruments as of June 30, 2015 and December 31, 2014 (dollars in thousands): Gross Amounts Not Offset in the Balance Sheet Gross Amounts Recognized Gross Amounts Offset in the Balance Sheet Net Amounts Presented in the Balance Sheet Financial Instruments Cash Collateral Pledged/ Received Net Amount June 30, 2015: Derivative assets $ 227,358 $ (22,230 ) $ 205,128 $ (15,587 ) $ (160,768 ) $ 28,773 Derivative liabilities 48,399 (22,230 ) 26,169 (54,692 ) (4,940 ) (33,463 ) December 31, 2014: Derivative assets $ 238,804 $ (14,111 ) $ 224,693 $ (20,260 ) $ (178,141 ) $ 26,292 Derivative liabilities 56,665 (14,111 ) 42,554 (47,222 ) — (4,668 ) The Company has elected to include all derivatives, except embedded derivatives, in the tables below, irrespective of whether the
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]	The following table presents the components of AOCI, before income tax, and the condensed consolidated income statement classification where the gain or loss is recognized related to cash flow hedges for the three and six months ended June 30, 2015 and 2014 (dollars in thousands): Three months ended June 30, 2015 2014 Accumulated other comprehensive income (loss), balance beginning of period $ (30,598 ) $ (4,020 ) Gains (losses) deferred in other comprehensive income (loss) on the effective portion of cash flow hedges 8,735 4,798 Amounts reclassified to investment related gains (losses), net (1,495 ) — Amounts reclassified to investment income (543 ) (321 ) Accumulated other comprehensive income (loss), balance end of period $ (23,901 ) $ 457 Six months ended June 30, 2015 2014 Accumulated other comprehensive income (loss), balance beginning of period $ (31,591 ) $ (4,578 ) Gains (losses) deferred in other comprehensive income (loss) on the effective portion of cash flow hedges 8,948 5,574 Amounts reclassified to investment related gains (losses), net (655 ) — Amounts reclassified to investment income (603 ) (539 ) Accumulated other comprehensive income (loss), balance end of period $ (23,901 ) $ 457
Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]	The following table presents the effects of derivatives in cash flow hedging relationships on the condensed consolidated statements of income and AOCI for the three and six months ended June 30, 2015 and 2014 (dollars in thousands): Effective Portion Ineffective Portion Derivative Type Gain (Loss) Recognized in OCI Gain (Loss) Reclassified into Income from OCI Classification of Gain (Loss) Reclassified into Net Income Gain (Loss) Recognized in Income Classification of Gain (Loss) Recognized in Net Income For the three months ended June 30, 2015: Interest rate swaps $ 2,417 $ 231 Investment Income $ — Investment related gains (losses) Forward bond purchase commitments: Principal 6,318 1,495 Investment related gains (losses) — Investment related gains (losses) Interest — 312 Investment Income — Investment related gains (losses) Total $ 8,735 $ 2,038 $ — For the three months ended June 30, 2014: Interest rate swaps $ 4,798 $ 321 Investment Income $ 7 Investment related gains (losses) For the six months ended June 30, 2015: Interest rate swaps $ (5,150 ) $ 291 Investment Income $ 7 Investment related gains (losses) Forward bond purchase commitments: Principal 14,098 655 Investment related gains (losses) — Investment related gains (losses) Interest — 312 Investment Income — Investment related gains (losses) Total $ 8,948 $ 1,258 $ 7 For the six months ended June 30, 2014: Interest rate swaps $ 5,574 $ 539 Investment Income $ 1 Investment related gains (losses)
Derivatives Hedging Instruments In Net Investment Hedging Relationships	The following table illustrates the Company’s net investments in foreign operations (“NIFO”) hedges for the three and six months ended June 30, 2015 and 2014 (dollars in thousands): Derivative Gains (Losses) Deferred in AOCI For the three months ended June 30, For the six months ended June 30, Type of NIFO Hedge (1) (2) 2015 2014 2015 2014 Foreign currency swaps $ (12,945 ) $ (22,335 ) $ 37,021 $ 744 (1) There were no sales or substantial liquidations of net investments in foreign operations that would have required the reclassification of gains or losses from accumulated other comprehensive income (loss) into investment income during the periods presented. (2) There was no ineffectiveness recognized for the Company’s hedges of net investments in foreign operations.
Derivative Instruments Gain Loss By Income Statement Location	A summary of the effect of non-hedging derivatives, including embedded derivatives, on the Company’s income statement for the three and six months ended June 30, 2015 and 2014 is as follows (dollars in thousands): Gain (Loss) for the three months ended June 30, Type of Non-hedging Derivative Income Statement Location of Gain (Loss) 2015 2014 Interest rate swaps Investment related gains (losses), net $ (41,729 ) $ 22,251 Interest rate options Investment related gains (losses), net — 2,004 Financial futures Investment related gains (losses), net (2,183 ) (7,684 ) Foreign currency forwards Investment related gains (losses), net (1,433 ) 1,178 CPI swaps Investment related gains (losses), net 168 114 Credit default swaps Investment related gains (losses), net (187 ) 4,783 Equity options Investment related gains (losses), net (2,606 ) (8,800 ) Longevity swaps Other revenues 1,911 — Mortality swaps Other revenues (478 ) — Subtotal (46,537 ) 13,846 Embedded derivatives in: Modified coinsurance or funds withheld arrangements Investment related gains (losses), net (23,098 ) 78,835 Indexed annuity products Interest credited 8,080 (27,285 ) Variable annuity products Investment related gains (losses), net 50,878 (5,183 ) Total non-hedging derivatives $ (10,677 ) $ 60,213 Gain (Loss) for the six months ended June 30, Type of Non-hedging Derivative Income Statement Location of Gain (Loss) 2015 2014 Interest rate swaps Investment related gains (losses), net $ (12,385 ) $ 51,904 Interest rate options Investment related gains (losses), net 3,275 3,286 Financial futures Investment related gains (losses), net (9,514 ) (9,268 ) Foreign currency forwards Investment related gains (losses), net (1,653 ) 2,332 CPI swaps Investment related gains (losses), net 97 467 Credit default swaps Investment related gains (losses), net 2,471 2,669 Equity options Investment related gains (losses), net (10,672 ) (17,765 ) Longevity swaps Other revenues 3,731 — Mortality swaps Other revenues (957 ) — Subtotal (25,607 ) 33,625 Embedded derivatives in: Modified coinsurance or funds withheld arrangements Investment related gains (losses), net (25,423 ) 156,076 Indexed annuity products Interest credited (21,246 ) (51,125 ) Variable annuity products Investment related gains (losses), net 25,745 (28,844 ) Total non-hedging derivatives $ (46,531 ) $ 109,732
Disclosure Of Credit Derivatives	The following table presents the estimated fair value, maximum amount of future payments and weighted average years to maturity of credit default swaps sold by the Company at June 30, 2015 and December 31, 2014 (dollars in thousands): June 30, 2015 December 31, 2014 Rating Agency Designation of Referenced Credit Obligations (1) Estimated Fair Value of Credit Default Swaps Maximum Amount of Future Payments under Credit Default Swaps (2) Weighted Average Years to Maturity (3) Estimated Fair Value of Credit Default Swaps Maximum Amount of Future Payments under Credit Default Swaps (2) Weighted Average Years to Maturity (3) AAA/AA-/A+/A/A- Single name credit default swaps $ 2,250 $ 189,500 4.6 $ 1,498 $ 167,500 4.6 Credit default swaps referencing indices — — — — — — Subtotal 2,250 189,500 4.6 1,498 167,500 4.6 BBB+/BBB/BBB- Single name credit default swaps (182 ) 281,200 4.8 168 217,200 4.9 Credit default swaps referencing indices 5,923 416,000 5.0 6,651 416,000 5.0 Subtotal 5,741 697,200 4.9 6,819 633,200 4.9 BB+ Single name credit default swaps (171 ) 5,000 4.0 (130 ) 5,000 4.5 Credit default swaps referencing indices — — — — — — Subtotal (171 ) 5,000 4.0 (130 ) 5,000 4.5 Total $ 7,820 $ 891,700 4.8 $ 8,187 $ 805,700 4.9 (1) The rating agency designations are based on ratings from Standard and Poor’s (“S&P”). (2) Assumes the value of the referenced credit obligations is zero. (3) The weighted average years to maturity of the credit default swaps is calculated based on weighted average notional amounts.
Changes In Estimated Fair Value Related To Embedded Derivatives	The related gains (losses) and the effect on net income after amortization of deferred acquisition costs (“DAC”) and income taxes for the three and six months ended June 30, 2015 and 2014 are reflected in the following table (dollars in thousands): Three months ended June 30, Six months ended June 30, 2015 2014 2015 2014 Embedded derivatives in modco or funds withheld arrangements included in investment related gains $ (23,098 ) $ 78,835 $ (25,423 ) $ 156,076 After the associated amortization of DAC and taxes, the related amounts included in net income (3,917 ) 17,962 (6,504 ) 36,042 Embedded derivatives in variable annuity contracts included in investment related gains 50,878 (5,183 ) 25,745 (28,844 ) After the associated amortization of DAC and taxes, the related amounts included in net income 19,608 (6,486 ) 10,198 (20,154 ) Amounts related to embedded derivatives in equity-indexed annuities included in benefits and expenses 8,080 (27,285 ) (21,246 ) (51,125 ) After the associated amortization of DAC and taxes, the related amounts included in net income 1,233 (15,600 ) (14,766 ) (33,976 )
Credit Risk	Information regarding the Company’s credit exposure related to its over-the-counter derivative contracts, centrally cleared derivative contracts and margin account for exchange-traded futures, excluding longevity and mortality swaps, at June 30, 2015 and December 31, 2014 are reflected in the following table (dollars in thousands): June 30, 2015 December 31, 2014 Estimated fair value of derivatives in net asset position $ 169,860 $ 175,209 Cash provided as collateral (1) 4,940 — Securities pledged to counterparties as collateral (2) 54,692 47,222 Cash pledged from counterparties as collateral (3) (160,768 ) (178,141 ) Securities pledged from counterparties as collateral (4) (15,587 ) (20,260 ) Initial margin for cleared derivatives (2) (31,960 ) (16,333 ) Net credit exposure $ 21,177 $ 7,697 Margin account related to exchange-traded futures (5) $ 6,283 $ 7,976 (1) Consists of receivable from counterparty, included in other assets. (2) Included in available-for-sale securities, primarily consists of U.S. Treasury securities. (3) Included in cash and cash equivalents, with obligation to return cash collateral recorded in other liabilities. (4) Consists of U.S. Treasury securities. (5) Included in cash and cash equivalents.

Fair Value of Assets and Liab27

Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Tables)	6 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Schedule Of Fair Value Assets and Liabilities Measured on Recurring Basis Table Text Block	Assets and liabilities measured at fair value on a recurring basis as of June 30, 2015 and December 31, 2014 are summarized below (dollars in thousands): June 30, 2015: Fair Value Measurements Using: Total Level 1 Level 2 Level 3 Assets: Fixed maturity securities – available-for-sale: Corporate securities $ 16,489,406 $ 157,790 $ 15,094,299 $ 1,237,317 Canadian and Canadian provincial governments 3,793,807 — 3,793,807 — Residential mortgage-backed securities 1,190,879 — 892,503 298,376 Asset-backed securities 1,062,624 — 482,114 580,510 Commercial mortgage-backed securities 1,525,469 — 1,447,650 77,819 U.S. government and agencies 1,263,998 1,111,189 125,450 27,359 State and political subdivisions 506,172 — 465,986 40,186 Other foreign government supranational and foreign government-sponsored enterprises 2,231,620 268,042 1,948,921 14,657 Total fixed maturity securities – available-for-sale 28,063,975 1,537,021 24,250,730 2,276,224 Funds withheld at interest – embedded derivatives (3,329 ) — — (3,329 ) Cash equivalents 665,037 665,037 — — Short-term investments 34,733 20,896 13,837 — Other invested assets: Non-redeemable preferred stock 90,574 78,186 — 12,388 Other equity securities 37,094 37,094 — — Derivatives: Interest rate swaps 52,864 — 52,864 — CPI swaps (23 ) — (23 ) — Credit default swaps 8,248 — 8,248 — Equity options 44,883 — 44,883 — Foreign currency swaps 88,303 — 88,303 — FVO contractholder-directed unit-linked investments 137,529 132,870 4,659 — Other 9,852 9,852 — — Total other invested assets 469,324 258,002 198,934 12,388 Other assets – longevity swaps 10,853 — — 10,853 Total $ 29,240,593 $ 2,480,956 $ 24,463,501 $ 2,296,136 Liabilities: Interest sensitive contract liabilities – embedded derivatives $ 1,069,154 $ — $ — $ 1,069,154 Other liabilities: Derivatives: Interest rate swaps 16,152 — 16,152 — Foreign currency forwards 7,422 — 7,422 — Credit default swaps 428 — 428 — Foreign currency swaps 413 — 413 — Mortality swaps 1,754 — — 1,754 Total $ 1,095,323 $ — $ 24,415 $ 1,070,908 December 31, 2014: Fair Value Measurements Using: Total Level 1 Level 2 Level 3 Assets: Fixed maturity securities – available-for-sale: Corporate securities $ 14,885,583 $ 115,822 $ 13,459,334 $ 1,310,427 Canadian and Canadian provincial governments 3,865,265 — 3,865,265 — Residential mortgage-backed securities 1,037,896 — 849,802 188,094 Asset-backed securities 1,069,586 — 496,626 572,960 Commercial mortgage-backed securities 1,532,591 — 1,445,845 86,746 U.S. government and agencies 525,851 437,129 60,193 28,529 State and political subdivisions 426,076 — 383,365 42,711 Other foreign government, supranational and foreign government-sponsored enterprises 2,138,124 285,995 1,832,466 19,663 Total fixed maturity securities – available-for-sale 25,480,972 838,946 22,392,896 2,249,130 Funds withheld at interest – embedded derivatives 22,094 — — 22,094 Cash equivalents 899,846 899,846 — — Short-term investments 45,190 21,536 23,654 — Other invested assets: Non-redeemable preferred stock 99,363 91,450 9 7,904 Other equity securities 27,497 27,497 — — Derivatives: Interest rate swaps 84,578 — 84,578 — Interest rate options 18,195 — 18,195 — CPI swaps (561 ) — (561 ) — Credit default swaps 8,606 — 8,606 — Equity options 35,242 — 35,242 — Foreign currency swaps 70,906 — 70,906 — FVO contractholder-directed unit-linked investments 140,344 134,749 5,595 — Other 6,420 6,420 — — Total other invested assets 490,590 260,116 222,570 7,904 Other assets - longevity swaps 7,727 — — 7,727 Total $ 26,946,419 $ 2,020,444 $ 22,639,120 $ 2,286,855 Liabilities: Interest sensitive contract liabilities – embedded derivatives $ 1,085,166 $ — $ — $ 1,085,166 Other liabilities: Derivatives: Interest rate swaps 12,957 — 12,957 — Foreign currency forwards 15,011 — 15,011 — Credit default swaps 419 — 419 — Forward purchase commitments 13,370 — 13,370 — Mortality swaps 797 — — 797 Total $ 1,127,720 $ — $ 41,757 $ 1,085,963
Fair Value Unobservable Input Measurements [Table Text Block]	The following table presents quantitative information about significant unobservable inputs used in Level 3 fair value measurements that are developed by the Company, which does not include unobservable Level 3 asset and liability measurements provided by third parties, as of June 30, 2015 and December 31, 2014 (dollars in thousands): June 30, 2015: Valuation Technique Unobservable Inputs Range (Weighted Average) Fair Value Assets: State and political subdivision securities $ 4,817 Market comparable securities Liquidity premium 1 % Corporate securities 205,003 Market comparable securities Liquidity premium 0-2% (1%) U.S. government and agencies securities 27,359 Market comparable securities Liquidity premium 0-1% (1%) Funds withheld at interest- embedded derivatives (3,329 ) Total return swap Mortality 0-100% (2%) Lapse 0-35% (8%) Withdrawal 0-5% (3%) CVA 0-5% (1%) Crediting rate 2-4% (3%) Longevity swaps 10,853 Discounted cash flow Mortality 0-100% (2%) Mortality improvement (10%)-10% (3%) Liabilities: Interest sensitive contract liabilities- embedded derivatives- indexed annuities 935,619 Discounted cash flow Mortality 0-100% (2%) Lapse 0-35% (8%) Withdrawal 0-5% (3%) Option budget projection 2-4% (3%) Interest sensitive contract liabilities- embedded derivatives- variable annuities 133,535 Discounted cash flow Mortality 0-100% (2%) Lapse 0-25% (9%) Withdrawal 0-7% (3%) CVA 0-5% (1%) Long-term volatility 0-27% (14%) Mortality swaps 1,754 Discounted cash flow Mortality 0-100% (1%) December 31, 2014: Fair Value Valuation Technique(s) Unobservable Input Range (Weighted Average) Assets: State and political subdivision securities $ 4,994 Market comparable securities Liquidity premium 1 % Corporate securities 205,392 Market comparable securities Liquidity premium 0-2% (1%) U.S. government and agencies securities 28,530 Market comparable securities Liquidity premium 0-1% (1%) Funds withheld at interest- embedded derivatives 22,094 Total return swap Mortality 0-100% (2%) Lapse 0-35% (7%) Withdrawal 0-5% (3%) CVA 0-5% (1%) Crediting rate 2-4% (3%) Longevity swaps 7,727 Discounted cash flow Mortality 0-100% (2%) Mortality improvement (10%)-10% (3%) Liabilities: Interest sensitive contract liabilities- embedded derivatives- indexed annuities 925,887 Discounted cash flow Mortality 0-100% (2%) Lapse 0-35% (7%) Withdrawal 0-5% (3%) Option budget projection 2-4% (3%) Interest sensitive contract liabilities- embedded derivatives- variable annuities 159,279 Discounted cash flow Mortality 0-100% (2%) Lapse 0-25% (8%) Withdrawal 0-7% (3%) CVA 0-5% (1%) Long-term volatility 0-27% (11%) Mortality swaps 797 Discounted cash flow Mortality 0-100% (1%)
Fair Value Inputs, Liabilities, Quantitative Information [Table Text Block]	The following table presents quantitative information about significant unobservable inputs used in Level 3 fair value measurements that are developed by the Company, which does not include unobservable Level 3 asset and liability measurements provided by third parties, as of June 30, 2015 and December 31, 2014 (dollars in thousands): June 30, 2015: Valuation Technique Unobservable Inputs Range (Weighted Average) Fair Value Assets: State and political subdivision securities $ 4,817 Market comparable securities Liquidity premium 1 % Corporate securities 205,003 Market comparable securities Liquidity premium 0-2% (1%) U.S. government and agencies securities 27,359 Market comparable securities Liquidity premium 0-1% (1%) Funds withheld at interest- embedded derivatives (3,329 ) Total return swap Mortality 0-100% (2%) Lapse 0-35% (8%) Withdrawal 0-5% (3%) CVA 0-5% (1%) Crediting rate 2-4% (3%) Longevity swaps 10,853 Discounted cash flow Mortality 0-100% (2%) Mortality improvement (10%)-10% (3%) Liabilities: Interest sensitive contract liabilities- embedded derivatives- indexed annuities 935,619 Discounted cash flow Mortality 0-100% (2%) Lapse 0-35% (8%) Withdrawal 0-5% (3%) Option budget projection 2-4% (3%) Interest sensitive contract liabilities- embedded derivatives- variable annuities 133,535 Discounted cash flow Mortality 0-100% (2%) Lapse 0-25% (9%) Withdrawal 0-7% (3%) CVA 0-5% (1%) Long-term volatility 0-27% (14%) Mortality swaps 1,754 Discounted cash flow Mortality 0-100% (1%) December 31, 2014: Fair Value Valuation Technique(s) Unobservable Input Range (Weighted Average) Assets: State and political subdivision securities $ 4,994 Market comparable securities Liquidity premium 1 % Corporate securities 205,392 Market comparable securities Liquidity premium 0-2% (1%) U.S. government and agencies securities 28,530 Market comparable securities Liquidity premium 0-1% (1%) Funds withheld at interest- embedded derivatives 22,094 Total return swap Mortality 0-100% (2%) Lapse 0-35% (7%) Withdrawal 0-5% (3%) CVA 0-5% (1%) Crediting rate 2-4% (3%) Longevity swaps 7,727 Discounted cash flow Mortality 0-100% (2%) Mortality improvement (10%)-10% (3%) Liabilities: Interest sensitive contract liabilities- embedded derivatives- indexed annuities 925,887 Discounted cash flow Mortality 0-100% (2%) Lapse 0-35% (7%) Withdrawal 0-5% (3%) Option budget projection 2-4% (3%) Interest sensitive contract liabilities- embedded derivatives- variable annuities 159,279 Discounted cash flow Mortality 0-100% (2%) Lapse 0-25% (8%) Withdrawal 0-7% (3%) CVA 0-5% (1%) Long-term volatility 0-27% (11%) Mortality swaps 797 Discounted cash flow Mortality 0-100% (1%)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Level Transfers [Table Text Block]	The following tables present the transfers between Level 1 and Level 2 during the three and six months ended June 30, 2015 and 2014 (dollars in thousands): 2015 2014 Transfers from Level 1 to Level 2 Transfers from Level 2 to Level 1 Transfers from Level 1 to Level 2 Transfers from Level 2 to Level 1 Three months ended June 30: Fixed maturity securities - available-for-sale: Corporate securities $ — $ 31,896 $ — $ 10,058 Six months ended June 30: Fixed maturity securities - available-for-sale: Corporate securities $ 625 $ 36,996 $ — $ 10,058
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]	The tables below provide a summary of the changes in fair value of Level 3 assets and liabilities for the three and six months ended June 30, 2015 , as well as the portion of gains or losses included in income for the three and six months ended June 30, 2015 attributable to unrealized gains or losses related to those assets and liabilities still held at June 30, 2015 (dollars in thousands): For the three months ended June 30, 2015: Fixed maturity securities - available-for-sale Corporate securities Residential mortgage- backed securities Asset-backed securities Commercial mortgage- backed securities U.S. government and agencies State Fair value, beginning of period $ 1,286,979 $ 192,579 $ 609,436 $ 93,869 $ 27,756 $ 41,875 Total gains/losses (realized/unrealized) Included in earnings, net: Investment income, net of related expenses (1,051 ) (156 ) 1,511 677 112 8 Investment related gains (losses), net (166 ) 17 283 (770 ) (10 ) (5 ) Claims & other policy benefits — — — — — — Interest credited — — — — — — Policy acquisition costs and other insurance expenses — — — — — — Included in other comprehensive income (16,902 ) (1,291 ) (301 ) (386 ) (559 ) (1,480 ) Purchases (1) 76,982 118,868 44,181 42 154 — Sales (1) (3,949 ) — (1,615 ) (2,000 ) — — Settlements (1) (103,696 ) (8,617 ) (63,751 ) (893 ) (94 ) (212 ) Transfers into Level 3 413 1,800 — — — — Transfers out of Level 3 (1,293 ) (4,824 ) (9,234 ) (12,720 ) — — Fair value, end of period $ 1,237,317 $ 298,376 $ 580,510 $ 77,819 $ 27,359 $ 40,186 Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period Included in earnings, net: Investment income, net of related expenses $ (997 ) $ (156 ) $ 706 $ 640 $ 112 $ 8 Investment related gains (losses), net — — — — — — Claims & other policy benefits — — — — — — Interest credited — — — — — — Policy acquisition costs and other insurance expenses — — — — — — For the three months ended June 30, 2015 (continued): Fixed maturity securities available-for-sale Other foreign government, supranational and foreign government-sponsored enterprises Funds withheld at interest- embedded derivatives Other invested assets - non-redeemable preferred stock Other assets longevity swaps Interest sensitive contract liabilities embedded derivatives Other liabilities mortality swaps Fair value, beginning of period $ 15,202 $ 19,769 $ 7,992 $ 8,602 $ (1,132,271 ) $ (1,276 ) Total gains/losses (realized/unrealized) Included in earnings, net: Investment income, net of related expenses — — — — — — Investment related gains (losses), net — (23,098 ) — — 50,878 — Claims & other policy benefits — — — — — — Interest credited — — — — 8,080 — Policy acquisition costs and other insurance expenses — — — — — — Included in other comprehensive income (232 ) — (104 ) 340 — — Other revenues — — — 1,911 — (478 ) Purchases (1) — — 4,500 — (13,924 ) — Sales (1) — — — — — — Settlements (1) (313 ) — — — 18,083 — Transfers into Level 3 — — — — — — Transfers out of Level 3 — — — — — — Fair value, end of period $ 14,657 $ (3,329 ) $ 12,388 $ 10,853 $ (1,069,154 ) $ (1,754 ) Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period Included in earnings, net: Investment income, net of related expenses $ — $ — $ — $ — $ — $ — Investment related gains (losses), net — (23,098 ) — — 48,603 — Other revenues — — — 1,911 — (478 ) Claims & other policy benefits — — — — — — Interest credited — — — — (10,003 ) — Policy acquisition costs and other insurance expenses — — — — — — For the six months ended June 30, 2015: Fixed maturity securities - available-for-sale Corporate securities Residential mortgage- backed securities Asset-backed securities Commercial mortgage- backed securities U.S. government and agencies State Fair value, beginning of period $ 1,310,427 $ 188,094 $ 572,960 $ 86,746 $ 28,529 $ 42,711 Total gains/losses (realized/unrealized) Included in earnings, net: Investment income, net of related expenses (1,854 ) (296 ) 2,930 1,271 93 15 Investment related gains (losses), net (571 ) (65 ) 356 (683 ) (117 ) (9 ) Claims & other policy benefits — — — — — — Interest credited — — — — — — Policy acquisition costs and other insurance expenses — — — — — — Included in other comprehensive income (10,833 ) (768 ) 3,331 (696 ) (383 ) (1,455 ) Purchases (1) 113,882 130,307 85,172 42 275 — Sales (1) (3,949 ) (714 ) (8,971 ) (2,956 ) — — Settlements (1) (163,296 ) (14,336 ) (67,873 ) (6,013 ) (1,038 ) (241 ) Transfers into Level 3 413 2,400 9,055 12,828 — — Transfers out of Level 3 (6,902 ) (6,246 ) (16,450 ) (12,720 ) — (835 ) Fair value, end of period $ 1,237,317 $ 298,376 $ 580,510 $ 77,819 $ 27,359 $ 40,186 Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period Included in earnings, net: Investment income, net of related expenses $ (1,800 ) $ (297 ) $ 2,105 $ 1,229 $ 93 $ 15 Investment related gains (losses), net — — — — — — Claims & other policy benefits — — — — — — Interest credited — — — — — — Policy acquisition costs and other insurance expenses — — — — — — For the six months ended June 30, 2015 (continued): Fixed maturity securities available-for-sale Other foreign government, supranational and foreign government-sponsored enterprises Funds withheld at interest- embedded derivatives Other invested assets - non-redeemable preferred stock Other assets longevity swaps Interest sensitive contract liabilities embedded derivatives Other liabilities mortality swaps Fair value, beginning of period $ 19,663 $ 22,094 $ 7,904 $ 7,727 $ (1,085,166 ) $ (797 ) Total gains/losses (realized/unrealized) Included in earnings, net: Investment income, net of related expenses — — — — — — Investment related gains (losses), net — (25,423 ) — — 25,745 — Claims & other policy benefits — — — — — — Interest credited — — — — — — Policy acquisition costs and other insurance expenses — — — — (21,246 ) — Included in other comprehensive income (50 ) — (16 ) (605 ) — — Other revenues — — — 3,731 — (957 ) Purchases (1) — — 4,529 — (25,568 ) — Sales (1) — — — — — — Settlements (1) (623 ) — — — — — Transfers into Level 3 — — — — 37,081 — Transfers out of Level 3 (4,333 ) — (29 ) — — — Fair value, end of period $ 14,657 $ (3,329 ) $ 12,388 $ 10,853 $ (1,069,154 ) $ (1,754 ) Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period Included in earnings, net: Investment income, net of related expenses $ — $ — $ — $ — $ — $ — Investment related gains (losses), net — (25,423 ) — — 20,358 — Other revenues — — — 3,731 — (957 ) Claims & other policy benefits — — — — — — Interest credited — — — — (58,327 ) — Policy acquisition costs and other insurance expenses — — — — — — (1) The amount reported within purchases, sales and settlements is the purchase price (for purchases) and the sales/settlement proceeds (for sales and settlements) based upon the actual date purchased or sold/settled. Items purchased and sold/settled in the same period are excluded from the rollforward. The Company had no issuances during the period. The tables below provide a summary of the changes in fair value of Level 3 assets and liabilities for the three and six months ended June 30, 2014 , as well as the portion of gains or losses included in income for the three and six months ended June 30, 2014 attributable to unrealized gains or losses related to those assets and liabilities still held at June 30, 2014 (dollars in thousands): For the three months ended June 30, 2014: Fixed maturity securities - available-for-sale Corporate securities Residential mortgage-backed securities Asset-backed securities Commercial mortgage-backed securities U.S. government and agencies Fair value, beginning of period $ 1,291,701 $ 177,927 $ 502,675 $ 90,373 $ 38,031 Total gains/losses (realized/unrealized) Included in earnings, net: Investment income, net of related expenses (1,273 ) 42 2,055 447 (185 ) Investment related gains (losses), net 165 31 942 6 (55 ) Claims & other policy benefits — — — — — Interest credited — — — — — Policy acquisition costs and other insurance expenses — — — — — Included in other comprehensive income 6,086 368 514 1,639 572 Purchases (1) 52,549 13,398 64,884 — 165 Sales (1) (8,929 ) — (14,258 ) — — Settlements (1) (49,002 ) (6,401 ) (6,318 ) (263 ) (5,534 ) Transfers into Level 3 — 901 5,666 5,712 — Transfers out of Level 3 (3,357 ) (719 ) — — — Fair value, end of period $ 1,287,940 $ 185,547 $ 556,160 $ 97,914 $ 32,994 Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period Included in earnings, net: Investment income, net of related expenses $ (1,274 ) $ 42 $ 2,005 $ 447 $ (185 ) Investment related gains (losses), net — — — — — Claims & other policy benefits — — — — — Interest credited — — — — — Policy acquisition costs and other insurance expenses — — — — — Fixed maturity securities - available-for-sale For the three months ended June 30, 2014 (continued): State and political subdivisions Other foreign government, supranational and foreign government-sponsored enterprises Funds withheld at interest- embedded derivatives Interest sensitive contract liabilities embedded derivatives Fair value, beginning of period $ 43,833 $ 11,157 $ (99,029 ) $ (911,987 ) Total gains/losses (realized/unrealized) Included in earnings, net: Investment income, net of related expenses 10 — — — Investment related gains (losses), net (4 ) — 78,835 (5,182 ) Claims & other policy benefits — — — — Interest credited — — — (27,285 ) Policy acquisition costs and other insurance expenses — — — — Included in other comprehensive income 2,330 33 — — Purchases (1) — — — (14,215 ) Sales (1) — — — — Settlements (1) (402 ) (302 ) — 18,433 Transfers into Level 3 — — — — Transfers out of Level 3 — — — — Fair value, end of period $ 45,767 $ 10,888 $ (20,194 ) $ (940,236 ) Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period Included in earnings, net: Investment income, net of related expenses $ 10 $ — $ — $ — Investment related gains (losses), net — — 78,835 (5,946 ) Claims & other policy benefits — — — — Interest credited — — — (45,718 ) Policy acquisition costs and other insurance expenses — — — — For the six months ended June 30, 2014: Fixed maturity securities - available-for-sale Corporate securities Residential mortgage- backed securities Asset-backed securities Commercial mortgage- backed securities U.S. Government and agencies Fair value, beginning of period $ 1,345,289 $ 153,505 $ 471,848 $ 101,785 $ 40,919 Total gains/losses (realized/unrealized) Included in earnings, net: Investment income, net of related expenses (2,385 ) 98 4,112 819 (282 ) Investment related gains (losses), net 5 137 1,247 92 (250 ) Claims & other policy benefits — — — — — Interest credited — — — — — Policy acquisition costs and other insurance expenses — — — — — Included in other comprehensive income 8,536 3,255 6,014 4,674 877 Purchases (1) 132,061 32,148 124,108 — 293 Sales (1) (47,676 ) (744 ) (20,870 ) (14,626 ) — Settlements (1) (100,946 ) (12,573 ) (12,633 ) (542 ) (8,563 ) Transfers into Level 3 6,930 11,464 11,614 5,712 — Transfers out of Level 3 (53,874 ) (1,743 ) (29,280 ) — — Fair value, end of period $ 1,287,940 $ 185,547 $ 556,160 $ 97,914 $ 32,994 Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period Included in earnings, net: Investment income, net of related expenses $ (2,336 ) $ 94 $ 2,005 $ 875 $ (282 ) Investment related gains (losses), net — — — — — Claims & other policy benefits — — — — — Interest credited — — — — — Policy acquisition costs and other insurance expenses — — — — — For the six months ended June 30, 2014 (continued): Fixed maturity securities available-for-sale State and political subdivisions Other foreign government, supranational and foreign government-sponsored enterprises Funds withheld at interest- embedded derivative Other invested assets- non-redeemable preferred stock Interest sensitive contract liabilities embedded derivatives Fair value, beginning of period $ 43,776 $ 37,997 $ (176,270 ) $ 4,962 $ (868,725 ) Total gains/losses (realized/unrealized) Included in earnings, net: Investment income, net of related expenses 21 — — — — Investment related gains (losses), net (8 ) — 156,076 — (28,844 ) Claims & other policy benefits — — — — — Interest credited — — — — (51,125 ) Policy acquisition costs and other insurance expenses — — — — — Included in other comprehensive income 2,443 33 — — — Purchases (1) — — — — (29,408 ) Sales (1) — — — — — Settlements (1) (465 ) (599 ) — — 37,866 Transfers into Level 3 — — — — — Transfers out of Level 3 — (26,543 ) — (4,962 ) — Fair value, end of period $ 45,767 $ 10,888 $ (20,194 ) $ — $ (940,236 ) Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period Included in earnings, net: Investment income, net of related expenses $ 21 $ — $ — $ — $ — Investment related gains (losses), net — — 156,076 — (30,156 ) Claims & other policy benefits — — — — — Interest credited — — — — (88,991 ) Policy acquisition costs and other insurance expenses — — — — — (1) The amount reported within purchases, sales and settlements is the purchase price (for purchases) and the sales/settlement proceeds (for sales and settlements) based upon the actual date purchased or sold/settled. Items purchased and sold/settled in the same period are excluded from the rollforward. The Company had no issuances during the period.
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Table Text Block]	The following table presents information for assets measured at estimated fair value on a nonrecurring basis during the periods presented; they are subject to fair value adjustments only in certain circumstances (for example, when there is evidence of impairment). The estimated fair values for these assets were determined using significant unobservable inputs (Level 3). Carrying Value After Measurement Net Investment Gains (Losses) At June 30, Three months ended June 30, Six months ended June 30, (dollars in thousands) 2015 2014 2015 2014 2015 2014 Mortgage loans (1) $ 5,850 $ 15,660 $ (11 ) $ (2,037 ) $ 39 $ (1,656 ) Limited partnership interests (2) 13,667 8,889 — (4,171 ) (4,509 ) (4,171 ) (1) Mortgage loans — The impaired mortgage loans presented above were written down to their estimated fair values at the date the impairments were recognized and are reported as losses above. Subsequent improvements in estimated fair value on previously impaired loans recorded through a reduction in the previously established valuation allowance are reported as gains above. Nonrecurring fair value adjustments on mortgage loans are based on the fair value of underlying collateral or discounted cash flows. (2) Limited partnership interests — The impaired limited partnership interests presented above were accounted for using the cost method. Impairments on these cost method investments were recognized at estimated fair value determined using the net asset values of the Company’s ownership interest as provided in the financial statements of the investees. The market for these investments has limited activity and price transparency.
Financial Instruments Carrying Amounts And Estimated Fair Value [Table Text Block]	The following table presents the carrying amounts and estimated fair values of the Company’s financial instruments, which were not measured at fair value on a recurring basis, at June 30, 2015 and December 31, 2014 (dollars in thousands). This table excludes any payables or receivables for collateral under repurchase agreements and other transactions. The estimated fair value of the excluded amount approximates carrying value as they equal the amount of cash collateral received/paid. June 30, 2015: Carrying Value Estimated Fair Value Fair Value Measurement Using: Level 1 Level 2 Level 3 Assets: Mortgage loans on real estate $ 3,073,313 $ 3,147,898 $ — $ — $ 3,147,898 Policy loans 1,438,156 1,438,156 — 1,438,156 — Funds withheld at interest (1) 5,840,518 6,278,068 — — 6,278,068 Cash and cash equivalents (2) 670,624 670,624 670,624 — — Short-term investments (2) 41,385 41,385 41,385 — — Other invested assets (2) 374,351 424,186 4,916 35,006 384,264 Accrued investment income 322,069 322,069 — 322,069 — Liabilities: Interest-sensitive contract liabilities (1) $ 9,679,250 $ 10,083,745 $ — $ — $ 10,083,745 Long-term debt 2,313,470 2,460,800 — — 2,460,800 Collateral finance and securitization notes 926,410 832,750 — — 832,750 December 31, 2014: Carrying Value Estimated Fair Value Fair Value Measurement Using: Level 1 Level 2 Level 3 Assets: Mortgage loans on real estate $ 2,712,238 $ 2,803,942 $ — $ — $ 2,803,942 Policy loans 1,284,284 1,284,284 — 1,284,284 — Funds withheld at interest (1) 5,897,202 6,367,165 — — 6,367,165 Cash and cash equivalents (2) 745,823 745,823 745,823 — — Short-term investments (2) 52,504 52,504 52,504 — — Other invested assets (2) 465,720 518,261 4,674 35,446 478,141 Accrued investment income 261,096 261,096 — 261,096 — Liabilities: Interest-sensitive contract liabilities (1) $ 9,623,596 $ 9,666,240 $ — $ — $ 9,666,240 Long-term debt 2,314,293 2,518,399 — — 2,518,399 Collateral finance and securitization notes 782,701 674,984 — — 674,984 (1) Carrying values presented herein differ from those presented in the condensed consolidated balance sheets because certain items within the respective financial statement caption are embedded derivatives and are measured at fair value on a recurring basis. (2) Carrying values presented herein differ from those presented in the condensed consolidated balance sheets because certain items within the respective financial statement caption are measured at fair value on a recurring basis.

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2015
Segment Reporting [Abstract]
Reconciliation Of Revenue From Segments To Consolidated Text Block	The Company’s reportable segments are strategic business units that are primarily segregated by geographic region. Information related to revenues, income (loss) before income taxes and total assets of the Company for each reportable segment are summarized below (dollars in thousands). Three months ended June 30, Six months ended June 30, Total revenues: 2015 2014 2015 2014 U.S. and Latin America: Traditional $ 1,342,248 $ 1,333,027 $ 2,597,538 $ 2,611,719 Non-Traditional 191,775 293,448 384,448 582,069 Total 1,534,023 1,626,475 2,981,986 3,193,788 Canada: Traditional 270,090 301,401 535,094 572,845 Non-Traditional 11,458 7,712 23,332 14,017 Total 281,548 309,113 558,426 586,862 Europe, Middle East and Africa: Traditional 284,192 307,100 579,424 614,850 Non-Traditional 75,308 84,218 130,684 142,325 Total 359,500 391,318 710,108 757,175 Asia Pacific: Traditional 411,314 465,538 805,189 852,427 Non-Traditional 7,076 17,633 26,646 45,773 Total 418,390 483,171 831,835 898,200 Corporate and Other 36,879 22,943 68,598 54,168 Total $ 2,630,340 $ 2,833,020 $ 5,150,953 $ 5,490,193
Reconciliation Of Operating Profit Loss From Segments To Consolidated Text Block	Three months ended June 30, Six months ended June 30, Income (loss) before income taxes: 2015 2014 2015 2014 U.S. and Latin America: Traditional $ 82,793 $ 93,988 $ 100,636 $ 144,960 Non-Traditional 70,393 95,474 124,898 178,598 Total 153,186 189,462 225,534 323,558 Canada: Traditional 22,736 32,009 45,463 51,442 Non-Traditional 3,094 3,011 7,225 3,642 Total 25,830 35,020 52,688 55,084 Europe, Middle East and Africa: Traditional 9,159 26,787 19,641 25,795 Non-Traditional 31,432 34,535 51,066 50,732 Total 40,591 61,322 70,707 76,527 Asia Pacific: Traditional 4,315 28,213 56,963 47,080 Non-Traditional (1,405 ) 6,715 8,740 14,159 Total 2,910 34,928 65,703 61,239 Corporate and Other (8,727 ) (20,197 ) (16,717 ) (16,433 ) Total $ 213,790 $ 300,535 $ 397,915 $ 499,975
Reconciliation Of Assets From Segment To Consolidated Text Block	Total Assets: June 30, 2015 December 31, 2014 U.S. and Latin America: Traditional $ 15,904,747 $ 14,159,824 Non-Traditional 13,854,077 11,572,251 Total 29,758,824 25,732,075 Canada: Traditional 3,805,372 3,946,942 Non-Traditional 25,348 49,186 Total 3,830,720 3,996,128 Europe, Middle East and Africa: Traditional 2,586,327 2,514,868 Non-Traditional 2,064,621 2,178,454 Total 4,650,948 4,693,322 Asia Pacific: Traditional 2,997,342 2,951,723 Non-Traditional 625,125 667,645 Total 3,622,467 3,619,368 Corporate and Other 5,597,312 6,638,718 Total $ 47,460,271 $ 44,679,611

Commitments and Contingent Li29

Commitments and Contingent Liabilities (Tables)	6 Months Ended
	Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block]	The Company's commitments to fund investments as of June 30, 2015 and December 31, 2014 are presented in the following table (dollars in thousands): June 30, 2015 December 31, 2014 Limited partnerships $ 240,386 $ 254,314 Commercial mortgage loans 7,100 33,850 Private placements 3,300 — Bank loans 52,467 52,859 Equity release mortgages 8,383 8,549
Credit Facilities	The following table provides additional information on the Company’s credit facilities as of June 30, 2015 and December 31, 2014 (dollars in thousands): Amount Utilized (1) Facility Capacity Maturity Date June 30, 2015 December 31, 2014 Basis of Fees $ 850,000 September 2019 $ 401,856 $ 204,774 Senior unsecured long-term debt rating 76,310 (2) November 2015 76,310 74,623 Fixed 120,000 May 2016 80,040 80,040 Fixed 38,535 (2) May 2016 26,975 28,612 Fixed 150,000 June 2016 130,000 130,000 Fixed 100,000 June 2017 76,029 81,747 Fixed 270,000 November 2017 270,000 270,000 Fixed 51,892 (2) March 2019 51,892 80,961 Fixed (1) Represents issued but undrawn letters of credit. There was no cash borrowed for the periods presented. (2) Foreign currency facility, amounts presented are in U.S. dollars.
Schedule of Guarantor Obligations [Table Text Block]	RGA’s guarantees issued as of June 30, 2015 and December 31, 2014 are reflected in the following table (dollars in thousands): June 30, 2015 December 31, 2014 Treaty guarantees $ 790,455 $ 826,496 Treaty guarantees, net of assets in trust 646,422 664,913 Borrowed securities 275,060 201,050 Financing arrangements 100,000 100,000 Lease obligations 5,245 6,085
Other Commitments [Table Text Block]	The following table presents the maximum potential obligation for these commitments as of June 30, 2015 (dollars in millions): Commitment Period June 30, 2015 2023 $ 500 2033 950 2034 3,000 2035 500 2036 1,432

Income Tax Income Tax (Tables)

Income Tax Income Tax (Tables)	6 Months Ended
	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	Provision for income tax expense differed from the amounts computed by applying the U.S. federal income tax statutory rate of 35% to pre-tax income as a result of the following for the three and six months ended June 30, 2015 and 2014 (dollars in thousands): Three months ended June 30, Six months ended June 30, 2015 2014 2015 2014 Tax provision at U.S. statutory rate $ 74,826 $ 105,187 $ 139,270 $ 174,991 Increase (decrease) in income taxes resulting from: Foreign tax rate differing from U.S. tax rate (764 ) (4,676 ) (6,285 ) (7,896 ) Differences in tax bases in foreign jurisdictions (6,931 ) (3,564 ) (13,601 ) (3,314 ) Deferred tax valuation allowance 4,967 2,510 11,758 (647 ) Amounts related to tax audit contingencies 952 778 1,905 1,556 Subpart F 11,452 3,691 17,886 6,129 Foreign tax credits (1,104 ) (1,155 ) (3,448 ) (2,010 ) Return to provision adjustments (212 ) 114 (4,977 ) (3,237 ) Other, net 213 (646 ) (98 ) (557 ) Total provision for income taxes $ 83,399 $ 102,239 $ 142,410 $ 165,015 Effective tax rate 39.0 % 34.0 % 35.8 % 33.0 %

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	6 Months Ended
	Jun. 30, 2015
Compensation and Retirement Disclosure [Abstract]
Schedule Of Defined Benefit Plans Disclosures Text Block	The components of net periodic benefit costs for the three and six months ended June 30, 2015 and 2014 were as follows (dollars in thousands): Pension Benefits Other Benefits Three months ended June 30, Three months ended June 30, 2015 2014 2015 2014 Service cost $ 2,586 $ 2,489 $ 589 $ 470 Interest cost 1,283 1,487 491 339 Expected return on plan assets (1,331 ) (1,302 ) — — Amortization of prior service cost 80 216 — — Amortization of prior actuarial loss 833 245 265 217 Net periodic benefit cost $ 3,451 $ 3,135 $ 1,345 $ 1,026 Pension Benefits Other Benefits Six months ended June 30, Six months ended June 30, 2015 2014 2015 2014 Service cost $ 4,616 $ 3,990 $ 1,178 $ 940 Interest cost 2,526 2,295 982 677 Expected return on plan assets (2,449 ) (2,235 ) — — Amortization of prior service cost 163 218 — — Amortization of prior actuarial loss 1,272 918 530 434 Net periodic benefit cost $ 6,128 $ 5,186 $ 2,690 $ 2,051

Retrocession Arrangements and32

Retrocession Arrangements and Reinsurance Ceded Receivables Retrocession Arrangements and Reinsurance Ceded Receivables (Tables)	6 Months Ended
	Jun. 30, 2015
Retrocession Arrangements And Reinsurance Ceded Receivables [Abstract]
Ceded Credit Risk [Table Text Block]	The following table presents information for the Company's reinsurance ceded receivable assets, including the respective amount and A.M. Best rating for each reinsurer representing in excess of five percent of the total as of June 30, 2015 and December 31, 2014 (dollars in thousands): June 30, 2015 December 31, 2014 Reinsurer A.M. Best Rating Amount % of Total Amount % of Total Reinsurer A A+ $ 201,915 28.4 % $ 210,996 36.5 % Reinsurer B A+ 193,294 27.2 45,541 7.9 Reinsurer C A+ 73,148 10.3 74,412 12.9 Reinsurer D A 45,464 6.4 43,818 7.6 Reinsurer E A++ 43,679 6.1 43,154 7.5 Other reinsurers 153,963 21.6 160,285 27.6 Total $ 711,463 100.0 % $ 578,206 100.0 %

Earnings Per Share (Reconciliat

Earnings Per Share (Reconciliation of the Numerators and Denominators of the Basic and Diluted Per Shares) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net Income (Loss) Available to Common Stockholders, Basic [Abstract]
Net income (numerator for basic and diluted calculations)	$ 130,391	$ 198,296	$ 255,505	$ 334,960
Shares:
Weighted average outstanding shares (denominator for basic calculation)	66,351	69,076	67,246	69,823
Equivalent shares from outstanding stock options	769	642	785	666
Denominator for diluted calculation	67,120	69,718	68,031	70,489
Earnings Per Share:
Basic earnings per share	$ 1.97	$ 2.87	$ 3.80	$ 4.80
Diluted earnings per share	$ 1.94	$ 2.84	$ 3.76	$ 4.75

Earnings Per Share (Narrative)

Earnings Per Share (Narrative) (Details) - shares shares in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Stock Options [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount	300	0
Contingently Issuable Shares [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount	700	800

Accumulated Other Comprehensi35

Accumulated Other Comprehensive Income (Balance of and Changes in Each Component of AOCI) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Other Comprehensive Income (Loss), before Tax				$ (700,801)	$ 940,231
Other Comprehensive Income (Loss), Tax				197,414	(293,500)
Net income		$ 130,391	$ 198,296	255,505	334,960
Balance, Beginning of Period				1,657,129	1,005,607
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest		213,790	300,535	397,915	499,975
Balance, End of Period		1,149,364	1,628,660	1,149,364	1,628,660
Provision for income taxes		(83,399)	(102,239)	(142,410)	(165,015)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax				(503,387)	646,731
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax				(89,220)	(9,162)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax				(6,616)	9,122
Net income				0	0
Balance, Beginning of Period				81,847	207,083
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest				0	0
Balance, End of Period		(13,989)	207,043	(13,989)	207,043
Provision for income taxes				0	0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax				(95,836)	(40)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Reclassification Adjustments and Tax	[1]			(612,314)	949,650
Other Comprehensive Income (Loss), Available-for-sale Securities, before Reclassification Adjustments, Tax	[1]			204,252	(302,873)
Net income	[1]			(5,655)	(24,698)
Balance, Beginning of Period	[1]			1,624,773	820,245
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	[1]			(6,192)	(37,661)
Balance, End of Period	[1]	1,211,056	1,442,324	1,211,056	1,442,324
Provision for income taxes	[1]			537	12,963
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	[1]			(408,062)	646,777
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, before Tax				733	(257)
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Tax				(222)	251
Net income				1,277	1,020
Balance, Beginning of Period				(49,491)	(21,721)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest				1,965	1,570
Balance, End of Period		$ (47,703)	$ (20,707)	(47,703)	(20,707)
Provision for income taxes				(688)	(550)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax				511	(6)
Amounts Reclassified From AOCI [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Net income				(4,378)	(23,678)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest				(4,227)	(36,091)
Provision for income taxes				$ (151)	$ 12,413
[1]	Includes cash flow hedges. See Note 5 - “Derivative Instruments” for additional information on cash flow hedges.

Accumulated Other Comprehensi36

Accumulated Other Comprehensive Income (Schedule of Reclassifications out of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2015		Jun. 30, 2014		Jun. 30, 2015	Jun. 30, 2014
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Investment related gains (losses), net	$ (12,041)		$ 119,397		$ (1,931)	$ 204,271
Investment income	450,539		410,607		877,430	814,982
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	2,038				1,258
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	213,790		300,535		397,915	499,975
Income Tax Expense (Benefit)	(83,399)		(102,239)		(142,410)	(165,015)
Net income	130,391		198,296		255,505	334,960
Unrealized Appreciation Depreciation Of Investments [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	(440)		31,833		6,192	37,661
Income Tax Expense (Benefit)	(245)		(11,059)		(537)	(12,963)
Net income	(685)		20,774		5,655	24,698
Unrealized Appreciation Depreciation Of Investments [Member] | Unrealized Gains Losses On Available For Sale Securities [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Investment related gains (losses), net	1,829		27,142		4,908	28,331
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	1,495		0		655	0
Unrealized Appreciation Depreciation Of Investments [Member] | Gains Losses On Qualifying Cash Flow Hedging Instruments [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Investment income	543		321		603	539
Unrealized Appreciation Depreciation Of Investments [Member] | DAC Attributed To Unrealized Gains Losses [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Deferred policy acquisition costs attributed to unrealized gains and losses	(4,307)	[1]	4,370	[1]	(26)	8,791	[1]
Amortization Of Unrealized Pension And Postretirement Benefits [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	(1,178)		(678)		(1,965)	(1,570)
Income Tax Expense (Benefit)	413		238		688	550
Net income	(765)		(440)		(1,277)	(1,020)
Amounts Reclassified From AOCI [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Net income	(1,450)		20,334		4,378	23,678
Prior Service Cost [Member] | Amortization Of Unrealized Pension And Postretirement Benefits [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Prior service cost	(80)	[2]	(216)	[2]	(163)	(218)	[2]
Actuarial Gains Losses [Member] | Amortization Of Unrealized Pension And Postretirement Benefits [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Actuarial gains/(losses)	$ (1,098)	[2]	$ (462)	[2]	$ 1,802	$ (1,352)	[2]
[1]	This AOCI component is included in the computation of the deferred policy acquisition cost. See Note 8 – “Deferred Policy Acquisition Costs” of the 2014 Annual Report for additional details.
[2]	These AOCI components are included in the computation of the net periodic pension cost. See Note 10 – “Employee Benefit Plans” for additional details.

Investments (Investments in Fix

Investments (Investments in Fixed Maturity and Equity Securities Available-for-Sale by Sector) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 16,000,887	$ 14,010,604
Unrealized Losses	393,841	134,919
Estimated Fair Value	$ 16,489,406	$ 14,885,583
% of Total	100.00%	100.00%
Fixed maturity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 26,305,332	$ 23,105,597
Unrealized Gains	2,147,882	2,508,673
Unrealized Losses	389,239	133,298
Estimated Fair Value	$ 28,063,975	$ 25,480,972
% of Total	100.00%	100.00%
Other-than-temporary impairments in AOCI	$ 1,555	$ (1,555)
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	129,359	120,534
Unrealized Gains	2,911	7,947
Unrealized Losses	4,602	1,621
Estimated Fair Value	$ 127,668	$ 126,860
% of Total	100.00%	100.00%
Corporate Debt Securities [Member] | Fixed maturity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 16,000,887	$ 14,010,604
Unrealized Gains	730,409	965,523
Unrealized Losses	241,890	90,544
Estimated Fair Value	$ 16,489,406	$ 14,885,583
% of Total	58.80%	58.40%
Other-than-temporary impairments in AOCI	$ 0	$ 0
Canadian and Canadian provincial governments | Fixed maturity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	2,655,763	2,668,852
Unrealized Gains	1,140,904	1,196,420
Unrealized Losses	2,860	7
Estimated Fair Value	$ 3,793,807	$ 3,865,265
% of Total	13.50%	15.20%
Other-than-temporary impairments in AOCI	$ 0	$ 0
Residential mortgage-backed securities | Fixed maturity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,154,732	991,867
Unrealized Gains	47,241	52,640
Unrealized Losses	11,094	6,611
Estimated Fair Value	$ 1,190,879	$ 1,037,896
% of Total	4.20%	4.10%
Other-than-temporary impairments in AOCI	$ (300)	$ (300)
Asset-backed securities | Fixed maturity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,051,093	1,059,660
Unrealized Gains	19,915	20,301
Unrealized Losses	8,384	10,375
Estimated Fair Value	$ 1,062,624	$ 1,069,586
% of Total	3.80%	4.20%
Other-than-temporary impairments in AOCI	$ 354	$ 354
Commercial Mortgage Backed Securities [Member] | Fixed maturity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,471,419	1,453,657
Unrealized Gains	63,699	87,593
Unrealized Losses	9,649	8,659
Estimated Fair Value	$ 1,525,469	$ 1,532,591
% of Total	5.40%	6.00%
Other-than-temporary impairments in AOCI	$ (1,609)	$ (1,609)
US Treasury and Government [Member] | Fixed maturity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,332,518	501,352
Unrealized Gains	18,149	25,014
Unrealized Losses	86,669	515
Estimated Fair Value	$ 1,263,998	$ 525,851
% of Total	4.50%	2.00%
Other-than-temporary impairments in AOCI	$ 0	$ 0
US States and Political Subdivisions Debt Securities [Member] | Fixed maturity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	478,262	378,457
Unrealized Gains	38,891	51,117
Unrealized Losses	10,981	3,498
Estimated Fair Value	$ 506,172	$ 426,076
% of Total	1.80%	1.70%
Other-than-temporary impairments in AOCI	$ 0	$ 0
Foreign Government Debt Securities [Member] | Fixed maturity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	2,160,658	2,041,148
Unrealized Gains	88,674	110,065
Unrealized Losses	17,712	13,089
Estimated Fair Value	$ 2,231,620	$ 2,138,124
% of Total	8.00%	8.40%
Other-than-temporary impairments in AOCI	$ 0	$ 0
Nonredeemable Preferred Stock [Member] | Equity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	91,717	93,540
Unrealized Gains	2,477	7,350
Unrealized Losses	3,620	1,527
Estimated Fair Value	$ 90,574	$ 99,363
% of Total	70.90%	78.30%
Other equity securities | Equity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 37,642	$ 26,994
Unrealized Gains	434	597
Unrealized Losses	982	94
Estimated Fair Value	$ 37,094	$ 27,497
% of Total	29.10%	21.70%

Investments (Fixed Maturity Sec

Investments (Fixed Maturity Securities Pledged And Received As Collateral) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$ 16,000,887	$ 14,010,604
Available-for-sale Securities	16,489,406	14,885,583
Collateral Fixed Maturity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	181,681	127,229
Available-for-sale Securities	190,298	134,863
Collateral Received Fixed Maturity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities	126,422	117,227
Reported Value Measurement [Member]
Schedule of Available-for-sale Securities [Line Items]
Assets Held-in-trust	9,948,045	10,197,489
Estimate of Fair Value Measurement [Member]
Schedule of Available-for-sale Securities [Line Items]
Assets Held-in-trust	$ 10,501,206	$ 10,922,947

Investments (Exposure To Concen

Investments (Exposure To Concentrations Of Credit Risk) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$ 16,000,887	$ 14,010,604
Available-for-sale Securities	16,489,406	14,885,583
Canadian Province Of Quebec Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	1,012,835	1,006,315
Available-for-sale Securities	1,560,409	1,599,673
Canadian Province Of Ontario Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	921,150	979,908
Available-for-sale Securities	$ 1,295,793	$ 1,359,339

Investments (Amortized Cost and

Investments (Amortized Cost and Fair Value of Fixed Maturities by Contractual Maturities) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Available For Sale Securities Debt Maturities Amortized Cost
Due in one year or less	$ 686,582
Due after one year through five years	4,882,381
Due after five year through ten years	7,920,478
Due after ten years	9,138,647
Asset and mortgage-backed securities	3,677,244
Total	26,305,332	$ 23,105,597
Available For Sale Securities Debt Maturities Fair Value
Due in one year or less	696,191
Due after one year through five years	5,118,186
Due after five year through ten years	8,213,365
Due after ten years	10,257,261
Asset and mortgage-backed securities	3,778,972
Total	$ 28,063,975	$ 25,480,972

Investments (Amortized Cost a41

Investments (Amortized Cost and Fair Value of Fixed Maturity Holdings by Industry Type) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Corporate Securities by Investment Sector And Credit Rating [Line Items]
Amortized Cost	$ 16,000,887	$ 14,010,604
Estimated Fair Value	$ 16,489,406	$ 14,885,583
% of Total	100.00%	100.00%
Finance
Corporate Securities by Investment Sector And Credit Rating [Line Items]
Amortized Cost	$ 5,238,400	$ 4,789,568
Estimated Fair Value	$ 5,419,421	$ 5,066,408
% of Total	32.90%	34.00%
Industrial
Corporate Securities by Investment Sector And Credit Rating [Line Items]
Amortized Cost	$ 9,057,282	$ 7,639,330
Estimated Fair Value	$ 9,281,262	$ 8,086,067
% of Total	56.20%	54.30%
Utility
Corporate Securities by Investment Sector And Credit Rating [Line Items]
Amortized Cost	$ 1,705,205	$ 1,581,706
Estimated Fair Value	$ 1,788,723	$ 1,733,108
% of Total	10.90%	11.70%

Investments Investments (Credit

Investments Investments (Credit Losses Recognized in Earnings on Fixed Maturity Securities Held by the Company) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held	$ 7,284	$ 7,284	$ 7,284	$ 7,284	$ 7,284	$ 7,284	$ 11,696	$ 11,696
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold	$ 0	$ 4,412	$ 0	$ 4,412

Investments (Fair Value Below A

Investments (Fair Value Below Amortized Cost of Gross Unrealized Losses for Fixed Maturity and Equity Securities) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Gross unrealized losses with number of securities [Line Items]
Gross Unrealized Losses	$ 393,841	$ 134,919
% of Total	100.00%	100.00%
Less than 20%
Gross unrealized losses with number of securities [Line Items]
Gross Unrealized Losses	$ 373,312	$ 111,965
% of Total	94.80%	83.00%
20% or more for less than six months
Gross unrealized losses with number of securities [Line Items]
Gross Unrealized Losses	$ 10,201	$ 13,698
% of Total	2.60%	10.10%
20% or more for six months or greater
Gross unrealized losses with number of securities [Line Items]
Gross Unrealized Losses	$ 10,328	$ 9,256
% of Total	2.60%	6.90%

Investments (Fair Value and Los

Investments (Fair Value and Losses by Investment Category and Length of Time in a Loss Position) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	$ 7,743,786	$ 2,437,278
Gross Unrealized Losses - Less than 12 months	346,050	73,639
Estimated Fair Value - 12 months or greater	654,932	1,068,336
Gross Unrealized Losses - 12 months or greater	43,189	59,659
Estimated Fair Value	8,398,718	3,505,614
Gross Unrealized Losses	389,239	133,298
Equity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	66,257	11,619
Gross Unrealized Losses - Less than 12 months	3,160	235
Estimated Fair Value - 12 months or greater	6,225	22,645
Gross Unrealized Losses - 12 months or greater	1,442	1,386
Estimated Fair Value	72,482	34,264
Gross Unrealized Losses	4,602	1,621
Non-investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	659,860	469,408
Gross Unrealized Losses - Less than 12 months	27,055	33,311
Estimated Fair Value - 12 months or greater	94,256	51,539
Gross Unrealized Losses - 12 months or greater	11,500	10,805
Estimated Fair Value	754,116	520,947
Gross Unrealized Losses	38,555	44,116
Investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	7,083,926	1,967,870
Gross Unrealized Losses - Less than 12 months	318,995	40,328
Estimated Fair Value - 12 months or greater	560,676	1,016,797
Gross Unrealized Losses - 12 months or greater	31,689	48,854
Estimated Fair Value	7,644,602	2,984,667
Gross Unrealized Losses	350,684	89,182
Corporate Debt Securities [Member] | Non-investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	553,615	415,886
Gross Unrealized Losses - Less than 12 months	23,667	29,316
Estimated Fair Value - 12 months or greater	58,910	32,567
Gross Unrealized Losses - 12 months or greater	5,891	3,404
Estimated Fair Value	612,525	448,453
Gross Unrealized Losses	29,558	32,720
Corporate Debt Securities [Member] | Investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	4,719,168	1,225,767
Gross Unrealized Losses - Less than 12 months	194,881	27,784
Estimated Fair Value - 12 months or greater	299,379	614,294
Gross Unrealized Losses - 12 months or greater	17,451	30,040
Estimated Fair Value	5,018,547	1,840,061
Gross Unrealized Losses	212,332	57,824
Canadian and Canadian provincial governments | Investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	117,996	0
Gross Unrealized Losses - Less than 12 months	2,860	0
Estimated Fair Value - 12 months or greater	0	1,235
Gross Unrealized Losses - 12 months or greater	0	7
Estimated Fair Value	117,996	1,235
Gross Unrealized Losses	2,860	7
Residential mortgage-backed securities | Non-investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	31,443	22,836
Gross Unrealized Losses - Less than 12 months	268	293
Estimated Fair Value - 12 months or greater	11,779	6,284
Gross Unrealized Losses - 12 months or greater	395	225
Estimated Fair Value	43,222	29,120
Gross Unrealized Losses	663	518
Residential mortgage-backed securities | Investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	309,772	78,864
Gross Unrealized Losses - Less than 12 months	6,659	846
Estimated Fair Value - 12 months or greater	64,855	135,414
Gross Unrealized Losses - 12 months or greater	3,772	5,247
Estimated Fair Value	374,627	214,278
Gross Unrealized Losses	10,431	6,093
Asset-backed securities | Non-investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	5,305	12,448
Gross Unrealized Losses - Less than 12 months	84	274
Estimated Fair Value - 12 months or greater	12,102	7,108
Gross Unrealized Losses - 12 months or greater	1,695	1,791
Estimated Fair Value	17,407	19,556
Gross Unrealized Losses	1,779	2,065
Asset-backed securities | Investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	294,220	332,785
Gross Unrealized Losses - Less than 12 months	3,101	4,021
Estimated Fair Value - 12 months or greater	126,602	109,411
Gross Unrealized Losses - 12 months or greater	3,504	4,289
Estimated Fair Value	420,822	442,196
Gross Unrealized Losses	6,605	8,310
Commercial mortgage-backed securities | Non-investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	6,523	3,288
Gross Unrealized Losses - Less than 12 months	534	249
Estimated Fair Value - 12 months or greater	7,544	5,580
Gross Unrealized Losses - 12 months or greater	3,347	5,385
Estimated Fair Value	14,067	8,868
Gross Unrealized Losses	3,881	5,634
Commercial mortgage-backed securities | Investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	220,262	78,632
Gross Unrealized Losses - Less than 12 months	4,376	564
Estimated Fair Value - 12 months or greater	22,831	28,375
Gross Unrealized Losses - 12 months or greater	1,392	2,461
Estimated Fair Value	243,093	107,007
Gross Unrealized Losses	5,768	3,025
US Government Agencies Debt Securities [Member] | Investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	862,953	81,317
Gross Unrealized Losses - Less than 12 months	86,669	89
Estimated Fair Value - 12 months or greater	0	32,959
Gross Unrealized Losses - 12 months or greater	0	426
Estimated Fair Value	862,953	114,276
Gross Unrealized Losses	86,669	515
US States and Political Subdivisions Debt Securities [Member] | Non-investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months		964
Gross Unrealized Losses - Less than 12 months		43
Estimated Fair Value - 12 months or greater		0
Gross Unrealized Losses - 12 months or greater		0
Estimated Fair Value		964
Gross Unrealized Losses		43
US States and Political Subdivisions Debt Securities [Member] | Investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	157,210	13,780
Gross Unrealized Losses - Less than 12 months	7,399	17
Estimated Fair Value - 12 months or greater	13,180	18,998
Gross Unrealized Losses - 12 months or greater	3,582	3,438
Estimated Fair Value	170,390	32,778
Gross Unrealized Losses	10,981	3,455
Foreign Government Debt Securities [Member] | Non-investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	62,974	13,986
Gross Unrealized Losses - Less than 12 months	2,502	3,136
Estimated Fair Value - 12 months or greater	3,921	0
Gross Unrealized Losses - 12 months or greater	172	0
Estimated Fair Value	66,895	13,986
Gross Unrealized Losses	2,674	3,136
Foreign Government Debt Securities [Member] | Investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	402,345	156,725
Gross Unrealized Losses - Less than 12 months	13,050	7,007
Estimated Fair Value - 12 months or greater	33,829	76,111
Gross Unrealized Losses - 12 months or greater	1,988	2,946
Estimated Fair Value	436,174	232,836
Gross Unrealized Losses	15,038	9,953
Nonredeemable Preferred Stock [Member] | Equity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	39,466	11,619
Gross Unrealized Losses - Less than 12 months	2,178	235
Estimated Fair Value - 12 months or greater	6,225	19,100
Gross Unrealized Losses - 12 months or greater	1,442	1,292
Estimated Fair Value	45,691	30,719
Gross Unrealized Losses	3,620	1,527
Other equity securities | Equity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	26,791	0
Gross Unrealized Losses - Less than 12 months	982	0
Estimated Fair Value - 12 months or greater	0	3,545
Gross Unrealized Losses - 12 months or greater	0	94
Estimated Fair Value	26,791	3,545
Gross Unrealized Losses	$ 982	$ 94

Investments (Investment Income

Investments (Investment Income Net of Related Expenses) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Major Categories Of Investment Income Net of Expenses [Line Items]
Investment revenue	$ 467,718	$ 424,740	$ 911,280	$ 843,437
Investment expense	(17,179)	(14,133)	(33,850)	(28,455)
Investment income, net of related expenses	450,539	410,607	877,430	814,982
Available-for-sale Securities [Member]
Major Categories Of Investment Income Net of Expenses [Line Items]
Investment revenue	303,792	253,456	573,560	497,418
Mortgage Loans on Real Estate [Member]
Major Categories Of Investment Income Net of Expenses [Line Items]
Investment revenue	37,121	30,373	71,893	63,465
Policy loans
Major Categories Of Investment Income Net of Expenses [Line Items]
Investment revenue	16,248	13,751	30,288	27,189
Funds withheld at interest
Major Categories Of Investment Income Net of Expenses [Line Items]
Investment revenue	87,325	108,059	199,585	220,798
Short-term Investments [Member]
Major Categories Of Investment Income Net of Expenses [Line Items]
Investment revenue	814	80	1,509	1,045
Other invested assets
Major Categories Of Investment Income Net of Expenses [Line Items]
Investment revenue	$ 22,418	$ 19,021	$ 34,445	$ 33,522

Investments (Investment Related

Investments (Investment Related Gains (Losses) Net) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Investment Gains And Losses [Abstract]
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net	$ 4,137	$ 870	$ 6,664	$ 1,173
Gain on investment activity	20,009	34,887	39,210	42,954
Loss on investment activity	(14,475)	(6,877)	(28,071)	(13,460)
Other impairment losses and change in mortgage loan provision	143	(5,309)	(4,025)	(3,645)
Derivatives and other, net	(17,718)	96,696	(9,045)	178,422
Total investment related gains (losses), net	$ (16,178)	$ 118,527	$ (8,595)	$ 203,098

Investments (Borrowed Securitie

Investments (Borrowed Securities Repurchased Securities And Repurchased Reversed Repurchased Securities) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Securities Sold under Agreements to Repurchase	$ 0	$ 92,446
Securities Sold under Agreements to Repurchase, Fair Value of Collateral	0	107,158
Securities for Reverse Repurchase Agreements	298,900	298,466
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities	340,201	338,929
Reported Value Measurement [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities Borrowed	275,060	201,050
Estimate of Fair Value Measurement [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities Borrowed	284,602	212,946
Securities for Reverse Repurchase Agreements	$ 313,771	$ 314,160

Investments (Securities Pledged

Investments (Securities Pledged as Collateral Related to Repurchase Reverse Repurchase Program) (Details) $ in Thousands	Jun. 30, 2015USD ($)
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	$ 313,771
Securities Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement	340,201
SecuredBorrowingsGrossDifferenceAmount	26,430
US Treasury Securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	200,531
Residential Mortgage Backed Securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	104,144
Other Debt Obligations [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	9,096
Maturity Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	9,096
Maturity Overnight [Member] | US Treasury Securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	0
Maturity Overnight [Member] | Residential Mortgage Backed Securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	0
Maturity Overnight [Member] | Other Debt Obligations [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	9,096
Maturity up to 30 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	0
Maturity up to 30 days [Member] | US Treasury Securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	0
Maturity up to 30 days [Member] | Residential Mortgage Backed Securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	0
Maturity up to 30 days [Member] | Other Debt Obligations [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	0
Maturity 30 to 90 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	23,237
Maturity 30 to 90 Days [Member] | US Treasury Securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	23,237
Maturity 30 to 90 Days [Member] | Residential Mortgage Backed Securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	0
Maturity 30 to 90 Days [Member] | Other Debt Obligations [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	0
Maturity over 90 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	281,438
Maturity over 90 days [Member] | US Treasury Securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	177,294
Maturity over 90 days [Member] | Residential Mortgage Backed Securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	104,144
Maturity over 90 days [Member] | Other Debt Obligations [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	$ 0

Investments (Mortgage Loans by

Investments (Mortgage Loans by Property Type) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Mortgage Loans on Real Estate [Line Items]
Recorded investment	$ 3,079,255	$ 2,718,709
Percentage of total	100.00%	100.00%
Apartment
Mortgage Loans on Real Estate [Line Items]
Recorded investment	$ 410,213	$ 376,430
Percentage of total	13.30%	13.80%
Retail
Mortgage Loans on Real Estate [Line Items]
Recorded investment	$ 964,540	$ 802,466
Percentage of total	31.40%	29.60%
Office building
Mortgage Loans on Real Estate [Line Items]
Recorded investment	$ 957,724	$ 851,749
Percentage of total	31.10%	31.30%
Industrial
Mortgage Loans on Real Estate [Line Items]
Recorded investment	$ 535,856	$ 466,583
Percentage of total	17.40%	17.20%
Other commercial
Mortgage Loans on Real Estate [Line Items]
Recorded investment	$ 210,922	$ 221,481
Percentage of total	6.80%	8.10%

Investments (Mortgage Loans b50

Investments (Mortgage Loans by Maturity Date) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Mortgage Loans on Real Estate [Line Items]
Mortgage loans, gross of valuation allowances	$ 3,079,255	$ 2,718,709
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	100.00%	100.00%
Due within five years
Mortgage Loans on Real Estate [Line Items]
Mortgage loans, gross of valuation allowances	$ 877,270	$ 860,362
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	28.50%	31.60%
Due after five years through ten years
Mortgage Loans on Real Estate [Line Items]
Mortgage loans, gross of valuation allowances	$ 1,459,108	$ 1,165,530
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	47.40%	42.90%
Due after ten years
Mortgage Loans on Real Estate [Line Items]
Mortgage loans, gross of valuation allowances	$ 742,877	$ 692,817
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	24.10%	25.50%

Investments (Mortgage Loans b51

Investments (Mortgage Loans by Credit Quality Indicator) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Mortgage Loans on Real Estate [Line Items]
Mortgage loans, gross of valuation allowances	$ 3,079,255	$ 2,718,709
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	100.00%	100.00%
High investment grade
Mortgage Loans on Real Estate [Line Items]
Mortgage loans, gross of valuation allowances	$ 1,553,149	$ 1,326,199
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	50.50%	48.80%
Investment grade
Mortgage Loans on Real Estate [Line Items]
Mortgage loans, gross of valuation allowances	$ 1,405,901	$ 1,235,046
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	45.70%	45.40%
Average
Mortgage Loans on Real Estate [Line Items]
Mortgage loans, gross of valuation allowances	$ 81,284	$ 118,152
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	2.60%	4.40%
Watch list
Mortgage Loans on Real Estate [Line Items]
Mortgage loans, gross of valuation allowances	$ 22,036	$ 22,285
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	0.70%	0.80%
In or near default
Mortgage Loans on Real Estate [Line Items]
Mortgage loans, gross of valuation allowances	$ 16,885	$ 17,027
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	0.50%	0.60%

Investments (Mortgage Loans b52

Investments (Mortgage Loans by Method of Evaluation and Related Valuation Allowances) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Mortgage Loans:
Total mortgage loans	$ 3,079,255	$ 2,718,709
Mortgage Loans on Real Estate, Commercial and Consumer, Net, (Investment Based Operations Presentation) [Abstract]
Mortgage loans on real estate (net of valuation allowances)	3,073,313	2,712,238
Commercial Real Estate Portfolio Segment
Mortgage Loans:
Evaluated individually for credit losses	16,885	17,027
Evaluated collectively for credit losses	3,062,370	2,701,682
Total mortgage loans	3,079,255	2,718,709
Valuation Allowances:
Specific for credit losses	671	816
Non-specifically identified credit losses	5,271	5,655
Total valuation allowances	$ 5,942	$ 6,471

Investments (Loan Valuation All

Investments (Loan Valuation Allowance for Mortgage Loans) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Allowance For Loan And Lease Losses Roll Forward
Balance, Beginning of Period	$ 6,130	$ 8,466	$ 6,471	$ 10,106
Charge-offs	0	0	0	24
Provision (release)	(188)	1,226	(529)	(438)
Balance, End of Period	$ 5,942	$ 9,692	$ 5,942	$ 9,692

Investments (Impaired Mortgage

Investments (Impaired Mortgage Loans) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Financing Receivable Impaired [Line Items]
Unpaid Principal Balance		$ 17,453		$ 17,453		$ 17,593
Recorded Investment		16,885		16,885		17,027
Related Allowance		671		671		816
Carrying Value		16,214		16,214		16,211
Average Investment	[1]	16,921	$ 30,444	16,956	$ 32,910
Interest Income		264	330	525	841
Impaired mortgage loans with valuation allowance recorded
Financing Receivable Impaired [Line Items]
Unpaid Principal Balance		13,039		13,039		10,279
Recorded Investment		12,531		12,531		10,316
Related Allowance		671		671		816
Carrying Value		11,860		11,860		9,500
Average Investment	[1]	11,397	15,855	11,036	16,151
Interest Income		229	259	384	452
Impaired mortgage loans with no valuation allowance recorded
Financing Receivable Impaired [Line Items]
Unpaid Principal Balance		4,414		4,414		7,314
Recorded Investment		4,354		4,354		6,711
Related Allowance		0		0		0
Carrying Value		4,354		4,354		$ 6,711
Average Investment	[1]	5,524	14,589	5,920	16,759
Interest Income		$ 35	$ 71	$ 141	$ 389
[1]	Average recorded investment represents the average loan balances as of the beginning of period and all subsequent quarterly end of period balances.

Investments (Other Invested Ass

Investments (Other Invested Assets) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Other Investments [Line Items]
Other invested assets	$ 1,110,107	$ 1,198,319
Equity securities
Other Investments [Line Items]
Other invested assets	127,668	126,860
Limited Partner [Member]
Other Investments [Line Items]
Other invested assets	492,465	446,604
Structured loans
Other Investments [Line Items]
Other invested assets	52,185	164,309
Derivatives
Other Investments [Line Items]
Other invested assets	194,276	216,966
Fair Value Option Contractholder Directed Unit Linked Investments [Member]
Other Investments [Line Items]
Other invested assets	137,529	140,344
Other
Other Investments [Line Items]
Other invested assets	$ 105,984	$ 103,236

Investments (Narrative) (Detail

Investments (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015USD ($)securities	Jun. 30, 2014USD ($)	Jun. 30, 2015USD ($)securities	Jun. 30, 2014USD ($)	Mar. 31, 2015USD ($)	Dec. 31, 2014USD ($)securities	Mar. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Investment Narrative [Line Items]
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held	$ 7,284	$ 7,284	$ 7,284	$ 7,284	$ 7,284	$ 7,284	$ 11,696	$ 11,696
Policy Loans Percent Of Total Investments	3.60%		3.60%			3.50%
Mortgage Loan To Value Ratio on Approval			75.00%
Mortgage Loan Percent Of Cash And Invested Assets	7.80%		7.80%			7.40%
Proceeds From Sale Of Available For Sale Securities Sold At Loss	$ 651,300	222,800	$ 850,900	457,900
Available-for-sale Securities, Gross Realized Losses	$ 14,475	$ 6,877	$ 28,071	$ 13,460
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | securities	1,566		1,566			932
Securities As Percentage Of Consolidated Stockholder Equity	10.00%		10.00%
Securities Borrowed Or Pledged, Minimum Fair Value Percentage			100.00%
Minimum Collateral Balance of Cash Received Fair Value			105.00%
Collateral Obtained Percent Of Fair Value Reverse Repurchase Agreements			100.00%
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	100.00%		100.00%			100.00%
Funds Withheld At Interest Percent Of Total Investments	14.70%		14.70%			16.10%
Funds withheld at interest	$ 5,840,076		$ 5,840,076			$ 5,922,561
Funds Held Under Reinsurance Agreements Asset Specific Client	$ 4,200,000		$ 4,200,000
Other Invested Assets Percent Of Cash And Invested Assets	2.80%		2.80%			3.30%
Assets Sold under Agreements to Repurchase, Repurchase Liability						$ 101,400
Securities Sold under Agreements to Repurchase, Fair Value of Collateral	$ 0		$ 0			107,158
Investment in mortgage loans
Investment Narrative [Line Items]
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	$ 0		$ 0			$ 0
CALIFORNIA
Investment Narrative [Line Items]
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	20.60%		20.60%			18.70%

Derivative Instruments (Gross N

Derivative Instruments (Gross Notional Amount and Fair Value of Derivatives Contracts) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Derivative [Line Items]
Notional Amount	$ 11,127,801	$ 11,125,976
Carrying Value / Fair Value of Assets	227,358	260,898
Carrying Value / Fair Value of Liabilities	1,120,882	1,141,831
Not Designated as Hedging Instrument
Derivative [Line Items]
Notional Amount	10,292,160	10,132,552
Carrying Value / Fair Value of Assets	139,055	188,817
Carrying Value / Fair Value of Liabilities	1,096,807	1,109,058
Not Designated as Hedging Instrument | Interest Rate Swap [Member]
Derivative [Line Items]
Notional Amount	966,658	1,144,661
Carrying Value / Fair Value of Assets	71,399	93,783
Carrying Value / Fair Value of Liabilities	11,025	3,934
Not Designated as Hedging Instrument | Interest Rate Options
Derivative [Line Items]
Notional Amount	0	240,000
Carrying Value / Fair Value of Assets	0	18,195
Carrying Value / Fair Value of Liabilities	0	0
Not Designated as Hedging Instrument | Financial Futures
Derivative [Line Items]
Notional Amount	313,905	275,983
Carrying Value / Fair Value of Assets	0	0
Carrying Value / Fair Value of Liabilities	0	0
Not Designated as Hedging Instrument | Foreign Currency Forwards
Derivative [Line Items]
Notional Amount	60,000	67,967
Carrying Value / Fair Value of Assets	129	87
Carrying Value / Fair Value of Liabilities	7,551	15,098
Not Designated as Hedging Instrument | Consumer Price Index Swaps
Derivative [Line Items]
Notional Amount	39,537	41,938
Carrying Value / Fair Value of Assets	34	0
Carrying Value / Fair Value of Liabilities	57	561
Not Designated as Hedging Instrument | Credit Default Swaps
Derivative [Line Items]
Notional Amount	891,700	805,700
Carrying Value / Fair Value of Assets	11,757	11,689
Carrying Value / Fair Value of Liabilities	3,937	3,502
Not Designated as Hedging Instrument | Equity Options
Derivative [Line Items]
Notional Amount	483,830	555,361
Carrying Value / Fair Value of Assets	44,883	35,242
Carrying Value / Fair Value of Liabilities	0	0
Not Designated as Hedging Instrument | Longevity Swap [Member]
Derivative [Line Items]
Notional Amount	891,760	450,000
Carrying Value / Fair Value of Assets	10,853	7,727
Carrying Value / Fair Value of Liabilities	0	0
Not Designated as Hedging Instrument | Mortality Swap [Member]
Derivative [Line Items]
Notional Amount	50,000	50,000
Carrying Value / Fair Value of Assets	0	0
Carrying Value / Fair Value of Liabilities	1,754	797
Not Designated as Hedging Instrument | Embedded Derivatives In Modified Coinsurance Or Funds Withheld Arrangements
Derivative [Line Items]
Notional Amount	0	0
Carrying Value / Fair Value of Assets	0	22,094
Carrying Value / Fair Value of Liabilities	3,329	0
Not Designated as Hedging Instrument | Embedded Derivatives In Indexed Annuity [Member]
Derivative [Line Items]
Notional Amount	0	0
Carrying Value / Fair Value of Assets	0	0
Carrying Value / Fair Value of Liabilities	935,619	925,887
Not Designated as Hedging Instrument | Embedded Derivatives In Variable Annuity [Member]
Derivative [Line Items]
Notional Amount	0	0
Carrying Value / Fair Value of Assets	0	0
Carrying Value / Fair Value of Liabilities	133,535	159,279
Not Designated as Hedging Instrument | Synthetic Guaranteed Investment Contracts
Derivative [Line Items]
Notional Amount	6,594,770	6,500,942
Carrying Value / Fair Value of Assets	0	0
Carrying Value / Fair Value of Liabilities	0	0
Designated As Hedging Instrument
Derivative [Line Items]
Notional Amount	835,641	993,424
Carrying Value / Fair Value of Assets	88,303	72,081
Carrying Value / Fair Value of Liabilities	24,075	32,773
Designated As Hedging Instrument | Interest Rate Swap [Member]
Derivative [Line Items]
Notional Amount	120,000	120,000
Carrying Value / Fair Value of Assets	0	0
Carrying Value / Fair Value of Liabilities	23,662	18,228
Designated As Hedging Instrument | Currency Swap [Member]
Derivative [Line Items]
Notional Amount	715,641	676,972
Carrying Value / Fair Value of Assets	88,303	70,906
Carrying Value / Fair Value of Liabilities	413	0
Designated As Hedging Instrument | Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	0	196,452
Carrying Value / Fair Value of Assets	0	1,175
Carrying Value / Fair Value of Liabilities	$ 0	$ 14,545

Derivative Instruments (Derivat

Derivative Instruments (Derivative Instruments Offsetting Balance Sheet) (Details) - USD ($) $ in Thousands		Jun. 30, 2015	Dec. 31, 2014
Derivative Assets [Abstract]
Derivative Fair Value Of Free Standing Derivative Asset		$ 227,358	$ 238,804
Gross Amounts Offset in the Balance Sheet		(22,230)	(14,111)
Net Amounts Presented in the Balance Sheet		205,128	224,693
Derivative Asset, Fair Value of Collateral	[1]	(15,587)	(20,260)
Gross Amounts Not Offset in the Balance Sheet - Cash Collateral Pledged/Received	[2]	(160,768)	(178,141)
Net Amount		28,773	26,292
Derivative Liabilities [Abstract]
Gross Amounts Recognized		48,399	56,665
Gross Amounts Offset in the Balance Sheet		(22,230)	(14,111)
Net Amounts Presented in the Balance Sheet		26,169	42,554
Gross Amounts Not Offset in the Balance Sheet - Financial Instruments	[3]	(54,692)	(47,222)
Gross Amounts Not Offset in the Balance Sheet - Cash Collateral Pledged/Received	[4]	(4,940)	0
Net Amount		$ (33,463)	$ (4,668)
[1]	Consists of U.S. Treasury securities.
[2]	Included in cash and cash equivalents, with obligation to return cash collateral recorded in other liabilities.
[3]	Included in available-for-sale securities, primarily consists of U.S. Treasury securities.
[4]	Consists of receivable from counterparty, included in other assets.

Derivative Instruments (Current

Derivative Instruments (Current Period Cash Flow Hedges in AOCI (loss) before Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
AOCI Cash Flow Hedges [Roll Forward]
Balance beginning	$ (30,598)	$ (4,020)	$ (31,591)	$ (4,578)
Gains (losses) deferred in other comprehensive income (loss) on the effective portion of cash flow hedges	8,735	4,798	8,948	5,574
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	(2,038)		(1,258)
Balance ending	(23,901)	457	(23,901)	457
Interest Rate Swap [Member]
AOCI Cash Flow Hedges [Roll Forward]
Gains (losses) deferred in other comprehensive income (loss) on the effective portion of cash flow hedges	2,417	4,798	(5,150)	5,574
Investment Income [Member]
AOCI Cash Flow Hedges [Roll Forward]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	(543)		(603)
Investment Income [Member] | Forward Contracts [Member]
AOCI Cash Flow Hedges [Roll Forward]
Gains (losses) deferred in other comprehensive income (loss) on the effective portion of cash flow hedges	0		0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	(312)		(312)
Investment Income [Member] | Interest Rate Swap [Member]
AOCI Cash Flow Hedges [Roll Forward]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	(231)	(321)	(291)	(539)
Investment Related Gains Losses [Member] | Forward Contracts [Member]
AOCI Cash Flow Hedges [Roll Forward]
Gains (losses) deferred in other comprehensive income (loss) on the effective portion of cash flow hedges	6,318		14,098
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	$ (1,495)	$ 0	$ (655)	$ 0

Derivative Instruments (Cash Fl

Derivative Instruments (Cash Flow Hedges) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Derivatives In Cash Flow Hedging Relationships [Line Items]
Gains (losses) deferred in other comprehensive income (loss) on the effective portion of cash flow hedges	$ 8,735	$ 4,798	$ 8,948	$ 5,574
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	2,038		1,258
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	0		7
Interest Rate Swaps
Derivatives In Cash Flow Hedging Relationships [Line Items]
Gains (losses) deferred in other comprehensive income (loss) on the effective portion of cash flow hedges	2,417	4,798	(5,150)	5,574
Investment Related Gains Losses [Member] | Interest Rate Swaps
Derivatives In Cash Flow Hedging Relationships [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	0	7	7	1
Investment Related Gains Losses [Member] | Forward Contracts [Member]
Derivatives In Cash Flow Hedging Relationships [Line Items]
Gains (losses) deferred in other comprehensive income (loss) on the effective portion of cash flow hedges	6,318		14,098
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	1,495	0	655	0
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	0		0
Investment Income [Member]
Derivatives In Cash Flow Hedging Relationships [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	543		603
Investment Income [Member] | Interest Rate Swaps
Derivatives In Cash Flow Hedging Relationships [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	231	$ 321	291	$ 539
Investment Income [Member] | Forward Contracts [Member]
Derivatives In Cash Flow Hedging Relationships [Line Items]
Gains (losses) deferred in other comprehensive income (loss) on the effective portion of cash flow hedges	0		0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	$ 312		$ 312

Derivative Instruments (Hedges

Derivative Instruments (Hedges of Net Investments in Foreign Operations) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Currency Swap [Member]
Derivatives, Fair Value [Line Items]
Net Derivatives Gains (Losses) Deferred in AOCI	[1],[2]	$ (12,945)	$ (22,335)	$ 37,021	$ 744
[1]	There was no ineffectiveness recognized for the Company’s hedges of net investments in foreign operations.
[2]	There were no sales or substantial liquidations of net investments in foreign operations that would have required the reclassification of gains or losses from accumulated other comprehensive income (loss) into investment income during the periods presented.

Derivative Instruments (Non Hed

Derivative Instruments (Non Hedging Derivatives and Embedded Derivatives Effect on Income Statement) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	$ (16,178)	$ 118,527	$ (8,595)	$ 203,098
Policy acquisition costs and other insurance expenses	(300,412)	(409,374)	(577,455)	(764,247)
Interest credited	(77,246)	(115,962)	(197,924)	(226,556)
Other revenues	66,936	120,726	129,223	188,316
Not Designated as Hedging Instrument
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	(10,677)	60,213	(46,531)	109,732
Not Designated as Hedging Instrument | Interest Rate Swaps
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	(41,729)	22,251	(12,385)	51,904
Not Designated as Hedging Instrument | Interest Rate Options
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	0	2,004	3,275	3,286
Not Designated as Hedging Instrument | Financial Futures
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	(2,183)	(7,684)	(9,514)	(9,268)
Not Designated as Hedging Instrument | Foreign Currency Forwards
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	(1,433)	1,178	(1,653)	2,332
Not Designated as Hedging Instrument | Consumer Price Index Swaps
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	168	114	97	467
Not Designated as Hedging Instrument | Credit Default Swaps
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	(187)	4,783	2,471	2,669
Not Designated as Hedging Instrument | Equity Options
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	(2,606)	(8,800)	(10,672)	(17,765)
Not Designated as Hedging Instrument | Longevity Swap [Member]
Income Affect Of Non Hedging Derivatives [Line Items]
Other revenues	1,911	0	3,731	0
Not Designated as Hedging Instrument | Mortality Swap [Member]
Income Affect Of Non Hedging Derivatives [Line Items]
Other revenues	(478)	0	(957)	0
Not Designated as Hedging Instrument | Embedded Derivatives In Modified Coinsurance Or Funds Withheld Arrangements
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	(23,098)	78,835	(25,423)	156,076
Not Designated as Hedging Instrument | Embedded Derivatives In Indexed Annuity [Member]
Income Affect Of Non Hedging Derivatives [Line Items]
Interest credited	8,080	(27,285)	(21,246)	(51,125)
Not Designated as Hedging Instrument | Embedded Derivatives In Variable Annuity [Member]
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	$ 50,878	$ (5,183)	$ 25,745	$ (28,844)

Derivative Instruments (Exposur

Derivative Instruments (Exposure from Credit Derivatives by Rating of the Underlying Credits) (Details) - USD ($) $ in Thousands		6 Months Ended	12 Months Ended
		Jun. 30, 2015	Dec. 31, 2014
Credit Derivatives [Line Items]
Credit Derivative Current Fair Value	[1]	$ 7,820	$ 8,187
Maximum Potential Future Exposure on Credit Risk Derivatives	[1],[2]	$ 891,700	$ 805,700
Derivative Average Remaining Maturity	[1],[3]	4 years 9 months	4 years 11 months
Standard Poors AAA To A Minus Ratings [Member] | Single Name Credit Default Swaps [Member]
Credit Derivatives [Line Items]
Credit Derivative Current Fair Value	[1]	$ 2,250	$ 1,498
Maximum Potential Future Exposure on Credit Risk Derivatives	[1],[2]	$ 189,500	$ 167,500
Derivative Average Remaining Maturity	[1],[3]	4 years 7 months	4 years 7 months
Standard Poors AAA To A Minus Ratings [Member] | Credit Default Swaps Referencing Indices [Member]
Credit Derivatives [Line Items]
Credit Derivative Current Fair Value	[1]	$ 0	$ 0
Maximum Potential Future Exposure on Credit Risk Derivatives	[1],[2]	0	0
Standard Poors AAA To A Minus Ratings [Member] | Credit Default Subtotal [Member]
Credit Derivatives [Line Items]
Credit Derivative Current Fair Value	[1]	2,250	1,498
Maximum Potential Future Exposure on Credit Risk Derivatives	[1],[2]	$ 189,500	$ 167,500
Derivative Average Remaining Maturity	[1],[3]	4 years 7 months	4 years 7 months
Standard Poors BBB Rating [Member] | Single Name Credit Default Swaps [Member]
Credit Derivatives [Line Items]
Credit Derivative Current Fair Value	[1]	$ (182)	$ 168
Maximum Potential Future Exposure on Credit Risk Derivatives	[1],[2]	$ 281,200	$ 217,200
Derivative Average Remaining Maturity	[1],[3]	4 years 9 months	4 years 11 months
Standard Poors BBB Rating [Member] | Credit Default Swaps Referencing Indices [Member]
Credit Derivatives [Line Items]
Credit Derivative Current Fair Value	[1]	$ 5,923	$ 6,651
Maximum Potential Future Exposure on Credit Risk Derivatives	[1],[2]	$ 416,000	$ 416,000
Derivative Average Remaining Maturity	[1],[3]	5 years	5 years
Standard Poors BBB Rating [Member] | Credit Default Subtotal [Member]
Credit Derivatives [Line Items]
Credit Derivative Current Fair Value	[1]	$ 5,741	$ 6,819
Maximum Potential Future Exposure on Credit Risk Derivatives	[1],[2]	$ 697,200	$ 633,200
Derivative Average Remaining Maturity	[1],[3]	4 years 11 months	4 years 11 months
Standard & Poor's, BB Rating [Member]
Credit Derivatives [Line Items]
Derivative Average Remaining Maturity	[1],[2]	4 years	4 years 6 months
Standard & Poor's, BB Rating [Member] | Single Name Credit Default Swaps [Member]
Credit Derivatives [Line Items]
Credit Derivative Current Fair Value	[1]	$ (171)	$ (130)
Maximum Potential Future Exposure on Credit Risk Derivatives	[1],[2]	5,000	5,000
Standard & Poor's, BB Rating [Member] | Credit Default Swaps Referencing Indices [Member]
Credit Derivatives [Line Items]
Credit Derivative Current Fair Value	[1]	0	0
Maximum Potential Future Exposure on Credit Risk Derivatives	[1],[2]	0	0
Standard & Poor's, BB Rating [Member] | Credit Default Subtotal [Member]
Credit Derivatives [Line Items]
Credit Derivative Current Fair Value	[1]	(171)	(130)
Maximum Potential Future Exposure on Credit Risk Derivatives	[1],[2]	$ 5,000	$ 5,000
[1]	The rating agency designations are based on ratings from Standard and Poor’s (“S&P”).
[2]	Assumes the value of the referenced credit obligations is zero.
[3]	The weighted average years to maturity of the credit default swaps is calculated based on weighted average notional amounts.

Derivative Instruments (Changes

Derivative Instruments (Changes in Estimated Fair Value Related to Embedded Derivatives) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Changes In Estimated Fair Value Related To Embedded Derivatives [Line Items]
Total investment related gains (losses), net	$ (16,178)	$ 118,527	$ (8,595)	$ 203,098
Gain Loss On Investments Related To Change In Fair Value Of Derivatives Excluding Embedded Derivatives	(46,537)	13,846	(25,607)	33,625
Total benefits and expenses	2,416,550	2,532,485	4,753,038	4,990,218
Net income	130,391	198,296	255,505	334,960
Embedded Derivatives In Modified Coinsurance Or Funds Withheld Arrangements
Changes In Estimated Fair Value Related To Embedded Derivatives [Line Items]
Total investment related gains (losses), net	(23,098)	78,835	(25,423)	156,076
Net income	(3,917)	17,962	(6,504)	36,042
Embedded Derivatives In Equity Indexed Annuities [Member]
Changes In Estimated Fair Value Related To Embedded Derivatives [Line Items]
Total benefits and expenses	8,080	(27,285)	(21,246)	(51,125)
Net income	1,233	(15,600)	(14,766)	(33,976)
Embedded Derivatives In Variable Annuity Contracts [Member]
Changes In Estimated Fair Value Related To Embedded Derivatives [Line Items]
Total investment related gains (losses), net	50,878	(5,183)	25,745	(28,844)
Net income	$ 19,608	$ (6,486)	$ 10,198	$ (20,154)

Derivative Instruments (Credit

Derivative Instruments (Credit Exposure of Derivative Contracts) (Details) - USD ($) $ in Thousands		Jun. 30, 2015	Dec. 31, 2014
Credit Exposure of Derivative Contracts
Estimated fair value of derivatives in net asset (liability) position		$ 169,860	$ 175,209
Derivative, Collateral, Right to Reclaim Cash	[1]	4,940	0
Derivative Liability, Fair Value of Collateral	[2]	54,692	47,222
Derivative, Collateral, Obligation to Return Cash	[3]	(160,768)	(178,141)
Derivative Asset, Fair Value of Collateral	[4]	(15,587)	(20,260)
Deposits with Clearing Organizations and Others, Securities		(31,960)	(16,333)
Net credit exposure		21,177	7,697
Margin account related to exchange-traded futures	[5]	$ 6,283	$ 7,976
[1]	Consists of receivable from counterparty, included in other assets.
[2]	Included in available-for-sale securities, primarily consists of U.S. Treasury securities.
[3]	Included in cash and cash equivalents, with obligation to return cash collateral recorded in other liabilities.
[4]	Consists of U.S. Treasury securities.
[5]	Included in cash and cash equivalents.

Derivative Instruments (Narrati

Derivative Instruments (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	$ 0.5		$ 0.5
Cumulative Foreign Currency Translation Gain Loss Recorded In Accumulated Other Comprehensive Income Loss For Terminated Net Investment In Foreign Operations Hedges	112.9		112.9		$ 75.8
Embedded Derivative Gain Loss In Financial Statements From Use Of Own Credit Risk	0.2	$ (0.5)	0.2	$ (1.3)
Embedded Derivative Gain Loss On Variable Annuity Contracts In Financial Statements From Use Of Own Credit Risk	$ (1.3)	$ 0.1	$ (0.8)	$ 0.5

Fair Value of Assets and Liab67

Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Balances of Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	$ 28,063,975	$ 25,480,972
Funds withheld at interest embedded derivatives	(3,329)	22,094
Cash and cash equivalents	665,037	899,846
Short-term investments	34,733	45,190
Investments, Fair Value Disclosure	469,324	490,590
Other Assets, Fair Value Disclosure	10,853	7,727
Assets, Fair Value Disclosure, Recurring	29,240,593	26,946,419
Fair Value Measured On Recurring Basis Guaranteed Interest Contracts Embedded Derivatives	1,069,154	1,085,166
Liabilities Fair Value Disclosure
Other liabilities		1,127,720
Liabilities, Fair Value Disclosure, Recurring	1,095,323
Nonredeemable Preferred Stock [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	90,574	99,363
Other equity securities
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	37,094	27,497
Other
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	9,852	6,420
Interest Rate Swaps
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	52,864	84,578
Liabilities Fair Value Disclosure
Other liabilities	16,152	12,957
Interest Rate Options
Assets Fair Value Disclosure
Investments, Fair Value Disclosure		18,195
Foreign Currency Forwards
Liabilities Fair Value Disclosure
Other liabilities	7,422	15,011
Currency Swap [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	88,303	70,906
Liabilities Fair Value Disclosure
Other liabilities	413
Fair Value Option Contractholder Directed Unit Linked Investments [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	137,529	140,344
Consumer Price Index Swaps
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	(23)	(561)
Credit Default Swaps
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	8,248	8,606
Liabilities Fair Value Disclosure
Other liabilities	428	419
Equity Option [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	44,883	35,242
Mortality Swap [Member]
Liabilities Fair Value Disclosure
Other liabilities	1,754	797
Purchase Commitment [Member]
Liabilities Fair Value Disclosure
Other liabilities		13,370
Corporate Debt Securities [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	16,489,406	14,885,583
Canadian and Canadian provincial governments
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	3,793,807	3,865,265
Residential mortgage-backed securities
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	1,190,879	1,037,896
Asset-backed securities
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	1,062,624	1,069,586
Commercial Mortgage Backed Securities [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	1,525,469	1,532,591
US Treasury And Government Member
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	1,263,998	525,851
US States and Political Subdivisions Debt Securities [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	506,172	426,076
Foreign Government Debt Securities [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	2,231,620	2,138,124
Fair Value Inputs Level 1 Member
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	1,537,021	838,946
Funds withheld at interest embedded derivatives	0	0
Cash and cash equivalents	665,037	899,846
Short-term investments	20,896	21,536
Investments, Fair Value Disclosure	258,002	260,116
Other Assets, Fair Value Disclosure	0	0
Assets, Fair Value Disclosure, Recurring	2,480,956	2,020,444
Fair Value Measured On Recurring Basis Guaranteed Interest Contracts Embedded Derivatives	0	0
Liabilities Fair Value Disclosure
Other liabilities		0
Liabilities, Fair Value Disclosure, Recurring	0
Fair Value Inputs Level 1 Member | Nonredeemable Preferred Stock [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	78,186	91,450
Fair Value Inputs Level 1 Member | Other equity securities
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	37,094	27,497
Fair Value Inputs Level 1 Member | Other
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	9,852	6,420
Fair Value Inputs Level 1 Member | Interest Rate Swaps
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	0
Liabilities Fair Value Disclosure
Other liabilities	0	0
Fair Value Inputs Level 1 Member | Interest Rate Options
Assets Fair Value Disclosure
Investments, Fair Value Disclosure		0
Fair Value Inputs Level 1 Member | Foreign Currency Forwards
Liabilities Fair Value Disclosure
Other liabilities	0	0
Fair Value Inputs Level 1 Member | Currency Swap [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	0
Liabilities Fair Value Disclosure
Other liabilities	0
Fair Value Inputs Level 1 Member | Fair Value Option Contractholder Directed Unit Linked Investments [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	132,870	134,749
Fair Value Inputs Level 1 Member | Consumer Price Index Swaps
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	0
Fair Value Inputs Level 1 Member | Credit Default Swaps
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	0
Liabilities Fair Value Disclosure
Other liabilities	0	0
Fair Value Inputs Level 1 Member | Equity Option [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	0
Fair Value Inputs Level 1 Member | Mortality Swap [Member]
Liabilities Fair Value Disclosure
Other liabilities	0	0
Fair Value Inputs Level 1 Member | Purchase Commitment [Member]
Liabilities Fair Value Disclosure
Other liabilities		0
Fair Value Inputs Level 1 Member | Corporate Debt Securities [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	157,790	115,822
Fair Value Inputs Level 1 Member | Canadian and Canadian provincial governments
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	0	0
Fair Value Inputs Level 1 Member | Residential mortgage-backed securities
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	0	0
Fair Value Inputs Level 1 Member | Asset-backed securities
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	0	0
Fair Value Inputs Level 1 Member | Commercial Mortgage Backed Securities [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	0	0
Fair Value Inputs Level 1 Member | US Treasury And Government Member
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	1,111,189	437,129
Fair Value Inputs Level 1 Member | US States and Political Subdivisions Debt Securities [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	0	0
Fair Value Inputs Level 1 Member | Foreign Government Debt Securities [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	268,042	285,995
Fair Value Inputs Level 2 Member
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	24,250,730	22,392,896
Funds withheld at interest embedded derivatives	0	0
Cash and cash equivalents	0	0
Short-term investments	13,837	23,654
Investments, Fair Value Disclosure	198,934	222,570
Other Assets, Fair Value Disclosure	0	0
Assets, Fair Value Disclosure, Recurring	24,463,501	22,639,120
Fair Value Measured On Recurring Basis Guaranteed Interest Contracts Embedded Derivatives	0	0
Liabilities Fair Value Disclosure
Other liabilities		41,757
Liabilities, Fair Value Disclosure, Recurring	24,415
Fair Value Inputs Level 2 Member | Nonredeemable Preferred Stock [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	9
Fair Value Inputs Level 2 Member | Other equity securities
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	0
Fair Value Inputs Level 2 Member | Other
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	0
Fair Value Inputs Level 2 Member | Interest Rate Swaps
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	52,864	84,578
Liabilities Fair Value Disclosure
Other liabilities	16,152	12,957
Fair Value Inputs Level 2 Member | Interest Rate Options
Assets Fair Value Disclosure
Investments, Fair Value Disclosure		18,195
Fair Value Inputs Level 2 Member | Foreign Currency Forwards
Liabilities Fair Value Disclosure
Other liabilities	7,422	15,011
Fair Value Inputs Level 2 Member | Currency Swap [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	88,303	70,906
Liabilities Fair Value Disclosure
Other liabilities	413
Fair Value Inputs Level 2 Member | Fair Value Option Contractholder Directed Unit Linked Investments [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	4,659	5,595
Fair Value Inputs Level 2 Member | Consumer Price Index Swaps
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	(23)	(561)
Fair Value Inputs Level 2 Member | Credit Default Swaps
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	8,248	8,606
Liabilities Fair Value Disclosure
Other liabilities	428	419
Fair Value Inputs Level 2 Member | Equity Option [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	44,883	35,242
Fair Value Inputs Level 2 Member | Mortality Swap [Member]
Liabilities Fair Value Disclosure
Other liabilities	0	0
Fair Value Inputs Level 2 Member | Purchase Commitment [Member]
Liabilities Fair Value Disclosure
Other liabilities		13,370
Fair Value Inputs Level 2 Member | Corporate Debt Securities [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	15,094,299	13,459,334
Fair Value Inputs Level 2 Member | Canadian and Canadian provincial governments
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	3,793,807	3,865,265
Fair Value Inputs Level 2 Member | Residential mortgage-backed securities
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	892,503	849,802
Fair Value Inputs Level 2 Member | Asset-backed securities
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	482,114	496,626
Fair Value Inputs Level 2 Member | Commercial Mortgage Backed Securities [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	1,447,650	1,445,845
Fair Value Inputs Level 2 Member | US Treasury And Government Member
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	125,450	60,193
Fair Value Inputs Level 2 Member | US States and Political Subdivisions Debt Securities [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	465,986	383,365
Fair Value Inputs Level 2 Member | Foreign Government Debt Securities [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	1,948,921	1,832,466
Fair Value Inputs Level 3 Member
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	2,276,224	2,249,130
Funds withheld at interest embedded derivatives	(3,329)	22,094
Cash and cash equivalents	0	0
Short-term investments	0	0
Investments, Fair Value Disclosure	12,388	7,904
Other Assets, Fair Value Disclosure	10,853	7,727
Assets, Fair Value Disclosure, Recurring	2,296,136	2,286,855
Fair Value Measured On Recurring Basis Guaranteed Interest Contracts Embedded Derivatives	1,069,154	1,085,166
Liabilities Fair Value Disclosure
Other liabilities		1,085,963
Liabilities, Fair Value Disclosure, Recurring	1,070,908
Fair Value Inputs Level 3 Member | Nonredeemable Preferred Stock [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	12,388	7,904
Fair Value Inputs Level 3 Member | Other equity securities
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	0
Fair Value Inputs Level 3 Member | Other
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	0
Fair Value Inputs Level 3 Member | Interest Rate Swaps
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	0
Liabilities Fair Value Disclosure
Other liabilities	0	0
Fair Value Inputs Level 3 Member | Interest Rate Options
Assets Fair Value Disclosure
Investments, Fair Value Disclosure		0
Fair Value Inputs Level 3 Member | Foreign Currency Forwards
Liabilities Fair Value Disclosure
Other liabilities	0	0
Fair Value Inputs Level 3 Member | Currency Swap [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	0
Liabilities Fair Value Disclosure
Other liabilities	0
Fair Value Inputs Level 3 Member | Fair Value Option Contractholder Directed Unit Linked Investments [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	0
Fair Value Inputs Level 3 Member | Consumer Price Index Swaps
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	0
Fair Value Inputs Level 3 Member | Credit Default Swaps
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	0
Liabilities Fair Value Disclosure
Other liabilities	0	0
Fair Value Inputs Level 3 Member | Equity Option [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	0
Fair Value Inputs Level 3 Member | Mortality Swap [Member]
Liabilities Fair Value Disclosure
Other liabilities	1,754	797
Fair Value Inputs Level 3 Member | Purchase Commitment [Member]
Liabilities Fair Value Disclosure
Other liabilities		0
Fair Value Inputs Level 3 Member | Corporate Debt Securities [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	1,237,317	1,310,427
Fair Value Inputs Level 3 Member | Canadian and Canadian provincial governments
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	0	0
Fair Value Inputs Level 3 Member | Residential mortgage-backed securities
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	298,376	188,094
Fair Value Inputs Level 3 Member | Asset-backed securities
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	580,510	572,960
Fair Value Inputs Level 3 Member | Commercial Mortgage Backed Securities [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	77,819	86,746
Fair Value Inputs Level 3 Member | US Treasury And Government Member
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	27,359	28,529
Fair Value Inputs Level 3 Member | US States and Political Subdivisions Debt Securities [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	40,186	42,711
Fair Value Inputs Level 3 Member | Foreign Government Debt Securities [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	$ 14,657	$ 19,663

Fair Value of Assets and Liab68

Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Quantitative Information for Level 3 Inputs) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Percentage Of Fixed Maturity Securities Classified As Level 3	8.10%	8.80%
Corporate Debt Securities [Member] | Market Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	$ (205,003)	$ (205,392)
Corporate Debt Securities [Member] | Weighted Average [Member] | Market Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount for Lack of Marketability	1.00%	1.00%
Corporate Debt Securities [Member] | Maximum [Member] | Market Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount for Lack of Marketability	2.00%	2.00%
Corporate Debt Securities [Member] | Minimum [Member] | Market Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount for Lack of Marketability	0.00%	0.00%
Longevity Swap [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	$ (10,853)	$ (7,727)
Longevity Swap [Member] | Weighted Average [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, Low End	2.00%	2.00%
Fair Value Inputs Mortality Improvement	3.00%	3.00%
Longevity Swap [Member] | Maximum [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, High End	100.00%	100.00%
Fair Value Inputs Mortality Improvement	10.00%	10.00%
Longevity Swap [Member] | Minimum [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, Low End	0.00%	0.00%
Fair Value Inputs Mortality Improvement	(10.00%)	(10.00%)
Funds Withheld At Interest Embedded Derivatives [Member] | Total Return Swap [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	$ (3,329)	$ 22,094
Funds Withheld At Interest Embedded Derivatives [Member] | Weighted Average [Member] | Total Return Swap [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate, Low End	8.00%	7.00%
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, Low End	2.00%	2.00%
Fair Value Inputs Withdrawal	3.00%
Fair Value Inputs, Entity Credit Risk	1.00%	1.00%
Fair Value Inputs Credit Rate	3.00%	3.00%
Funds Withheld At Interest Embedded Derivatives [Member] | Maximum [Member] | Total Return Swap [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate, High End	35.00%	35.00%
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, High End	100.00%	100.00%
Fair Value Inputs Withdrawal	5.00%	5.00%
Fair Value Inputs, Entity Credit Risk	5.00%	5.00%
Fair Value Inputs Credit Rate	4.00%	4.00%
Funds Withheld At Interest Embedded Derivatives [Member] | Minimum [Member] | Total Return Swap [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate, Low End	0.00%	0.00%
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, Low End	0.00%	0.00%
Fair Value Inputs Withdrawal	0.00%	0.00%
Fair Value Inputs, Entity Credit Risk	0.00%	0.00%
Fair Value Inputs Credit Rate	2.00%	2.00%
US Government Agencies Debt Securities [Member] | Market Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	$ (27,359)	$ (28,530)
US Government Agencies Debt Securities [Member] | Weighted Average [Member] | Market Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount for Lack of Marketability	1.00%	1.00%
US Government Agencies Debt Securities [Member] | Maximum [Member] | Market Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount for Lack of Marketability	1.00%	1.00%
US Government Agencies Debt Securities [Member] | Minimum [Member] | Market Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount for Lack of Marketability	0.00%	0.00%
US States and Political Subdivisions Debt Securities [Member] | Market Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	$ (4,817)	$ (4,994)
US States and Political Subdivisions Debt Securities [Member] | Weighted Average [Member] | Market Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount for Lack of Marketability	1.00%	1.00%
US States and Political Subdivisions Debt Securities [Member] | Maximum [Member] | Market Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount for Lack of Marketability	1.00%	1.00%
US States and Political Subdivisions Debt Securities [Member] | Minimum [Member] | Market Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount for Lack of Marketability	1.00%	1.00%
Embedded Derivatives In Indexed Annuity [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	$ 935,619	$ 925,887
Embedded Derivatives In Indexed Annuity [Member] | Weighted Average [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate, Low End	8.00%	7.00%
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, Low End	2.00%	2.00%
Fair Value Inputs Withdrawal	3.00%	3.00%
Fair Value Inputs Option Budget Projection	3.00%	3.00%
Embedded Derivatives In Indexed Annuity [Member] | Maximum [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate, High End	35.00%	35.00%
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, High End	100.00%	100.00%
Fair Value Inputs Withdrawal	5.00%	5.00%
Fair Value Inputs Option Budget Projection	4.00%	4.00%
Embedded Derivatives In Indexed Annuity [Member] | Minimum [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate, Low End	0.00%	0.00%
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, Low End	0.00%	0.00%
Fair Value Inputs Withdrawal	0.00%	0.00%
Fair Value Inputs Option Budget Projection	2.00%	2.00%
Embedded Derivatives In Variable Annuity [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	$ 133,535	$ 159,279
Embedded Derivatives In Variable Annuity [Member] | Weighted Average [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate, Low End	9.00%	8.00%
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, Low End	2.00%	2.00%
Fair Value Inputs Withdrawal	3.00%	3.00%
Embedded Derivatives In Variable Annuity [Member] | Maximum [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate, High End	25.00%	25.00%
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, High End	100.00%	100.00%
Fair Value Inputs Withdrawal	7.00%	7.00%
Embedded Derivatives In Variable Annuity [Member] | Minimum [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate, Low End	0.00%	0.00%
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, Low End	0.00%	0.00%
Fair Value Inputs Withdrawal	0.00%	0.00%
Embedded Derivatives In Variable Annuity Contracts [Member] | Weighted Average [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Entity Credit Risk	1.00%	1.00%
Fair Value Assumptions, Expected Volatility Rate	14.00%	11.00%
Embedded Derivatives In Variable Annuity Contracts [Member] | Maximum [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Entity Credit Risk	5.00%	5.00%
Fair Value Assumptions, Expected Volatility Rate	27.00%	27.00%
Embedded Derivatives In Variable Annuity Contracts [Member] | Minimum [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Entity Credit Risk	0.00%	0.00%
Fair Value Assumptions, Expected Volatility Rate	0.00%	0.00%
Mortality Swap [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	$ 1,754	$ 797
Mortality Swap [Member] | Weighted Average [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, Low End	1.00%	1.00%
Mortality Swap [Member] | Maximum [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, High End	100.00%	100.00%
Mortality Swap [Member] | Minimum [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, Low End	0.00%	0.00%

Fair Value of Assets and Liab69

Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Fair Value Assets Transfers between Level 1 and Level 2) (Details) - Corporate Debt Securities [Member] - Available-for-sale Securities [Member]	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Equity, Level 1 to Level 2 Transfers, Description	0	0	625	0
Fair Value, Equity, Level 2 to Level 1 Transfers, Description	31,896	10,058	36,996	10,058

Fair Value of Assets and Liab70

Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Changes in Level 3 Assets and Liabilities) (Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2015		Jun. 30, 2014	Jun. 30, 2015		Jun. 30, 2014	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Funds Withheld At Interest Embedded Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		$ 19,769		$ (99,029)	$ 22,094		$ (176,270)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		0		0	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		0	[1]	0	0	[1]	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales		0	[1]	0	0	[1]	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		0	[1]	0	0	[1]	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		0		0	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		(3,329)		(20,194)	(3,329)		(20,194)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		0		0	0		0
Funds Withheld At Interest Embedded Derivatives [Member] | Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0	0		0
Funds Withheld At Interest Embedded Derivatives [Member] | Investment Related Gains Losses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		(23,098)		78,835	(25,423)		156,076
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		(23,098)		78,835	(25,423)		156,076
Funds Withheld At Interest Embedded Derivatives [Member] | Insurance Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0	0		0
Funds Withheld At Interest Embedded Derivatives [Member] | Interest Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0	0		0
Funds Withheld At Interest Embedded Derivatives [Member] | Policy Acquisition Costs And Other Insurance Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0	0		0
Funds Withheld At Interest Embedded Derivatives [Member] | Other Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0			0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0			0
Nonredeemable Preferred Stock [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		7,992			7,904
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		(104)			(16)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	[1]	4,500			4,529
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	[1]	0			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	[1]	0			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		0			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		12,388			12,388
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value				0			0				$ 4,962
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss)							0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases							0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales							0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements							0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3							0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3							4,962
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		0			(29)
Nonredeemable Preferred Stock [Member] | Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0			0
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)							0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0			0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings							0
Nonredeemable Preferred Stock [Member] | Investment Related Gains Losses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0			0
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)							0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0			0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings							0
Nonredeemable Preferred Stock [Member] | Insurance Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0			0
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)							0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0			0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings							0
Nonredeemable Preferred Stock [Member] | Interest Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0			0
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)							0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0			0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings							0
Nonredeemable Preferred Stock [Member] | Policy Acquisition Costs And Other Insurance Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0			0
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)							0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0			0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings							0
Nonredeemable Preferred Stock [Member] | Other Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0			0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0			0
Longevity Swap [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		8,602			7,727
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		340			(605)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		0			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales		0			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		0			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		0			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		10,853			10,853
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		0			0
Longevity Swap [Member] | Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0			0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0			0
Longevity Swap [Member] | Investment Related Gains Losses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0			0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0			0
Longevity Swap [Member] | Insurance Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0			0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0			0
Longevity Swap [Member] | Interest Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0			0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0			0
Longevity Swap [Member] | Policy Acquisition Costs And Other Insurance Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0			0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0			0
Longevity Swap [Member] | Other Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		1,911			3,731
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		1,911			3,731
Interest Sensitive Contract Liabilities Embedded Derivatives [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value		(1,069,154)		(940,236)	(1,069,154)		(940,236)	$ (1,132,271)	$ (1,085,166)	$ (911,987)	$ (868,725)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss)		0		0	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases		(13,924)	[1]	(14,215)	(25,568)	[1]	(29,408)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales		0	[1]	0	0	[1]	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements		18,083	[1]	18,433	0	[1]	37,866
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3		0		0	37,081		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3		0		0	0		0
Interest Sensitive Contract Liabilities Embedded Derivatives [Member] | Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings		0		0	0		0
Interest Sensitive Contract Liabilities Embedded Derivatives [Member] | Investment Related Gains Losses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)		48,603		(5,946)	20,358		(30,156)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings		50,878		(5,182)	25,745		(28,844)
Interest Sensitive Contract Liabilities Embedded Derivatives [Member] | Insurance Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings		0		0	0		0
Interest Sensitive Contract Liabilities Embedded Derivatives [Member] | Interest Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)		(10,003)		(45,718)	(58,327)		(88,991)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings		8,080		(27,285)	0		(51,125)
Interest Sensitive Contract Liabilities Embedded Derivatives [Member] | Policy Acquisition Costs And Other Insurance Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings		0		0	(21,246)		0
Interest Sensitive Contract Liabilities Embedded Derivatives [Member] | Other Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0			0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings		0			0
Mortality Swap [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value		(1,754)			(1,754)			$ (1,276)	$ (797)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss)		0			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases	[1]	0			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales	[1]	0			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements	[1]	0			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3		0			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3		0			0
Mortality Swap [Member] | Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0			0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings		0			0
Mortality Swap [Member] | Investment Related Gains Losses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0			0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings		0			0
Mortality Swap [Member] | Insurance Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0			0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings		0			0
Mortality Swap [Member] | Interest Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0			0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings		0			0
Mortality Swap [Member] | Policy Acquisition Costs And Other Insurance Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0			0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings		0			0
Mortality Swap [Member] | Other Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)		(478)			(957)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings		(478)			(957)
Available-for-sale Securities [Member] | Corporate Debt Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		1,286,979		1,291,701	1,310,427		1,345,289
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		(16,902)		6,086	(10,833)		8,536
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		76,982	[1]	52,549	113,882	[1]	132,061
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales		(3,949)	[1]	(8,929)	(3,949)	[1]	(47,676)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		(103,696)	[1]	(49,002)	(163,296)	[1]	(100,946)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		413		0	413		6,930
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		1,237,317		1,287,940	1,237,317		1,287,940
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		(1,293)		3,357	(6,902)		53,874
Available-for-sale Securities [Member] | Corporate Debt Securities [Member] | Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		(997)		(1,274)	(1,800)		(2,336)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		(1,051)		(1,273)	(1,854)		(2,385)
Available-for-sale Securities [Member] | Corporate Debt Securities [Member] | Investment Related Gains Losses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		(166)		165	(571)		5
Available-for-sale Securities [Member] | Corporate Debt Securities [Member] | Insurance Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0	0		0
Available-for-sale Securities [Member] | Corporate Debt Securities [Member] | Interest Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0	0		0
Available-for-sale Securities [Member] | Corporate Debt Securities [Member] | Policy Acquisition Costs And Other Insurance Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0	0		0
Available-for-sale Securities [Member] | Residential mortgage-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		192,579		177,927	188,094		153,505
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		(1,291)		368	(768)		3,255
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		118,868	[1]	13,398	130,307	[1]	32,148
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales		0	[1]	0	(714)	[1]	(744)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		(8,617)	[1]	(6,401)	(14,336)	[1]	(12,573)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		1,800		901	2,400		11,464
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		298,376		185,547	298,376		185,547
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		(4,824)		719	(6,246)		1,743
Available-for-sale Securities [Member] | Residential mortgage-backed securities | Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		(156)		42	(297)		94
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		(156)		42	(296)		98
Available-for-sale Securities [Member] | Residential mortgage-backed securities | Investment Related Gains Losses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		17		31	(65)		137
Available-for-sale Securities [Member] | Residential mortgage-backed securities | Insurance Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0	0		0
Available-for-sale Securities [Member] | Residential mortgage-backed securities | Interest Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0	0		0
Available-for-sale Securities [Member] | Residential mortgage-backed securities | Policy Acquisition Costs And Other Insurance Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0	0		0
Available-for-sale Securities [Member] | Asset-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		609,436		502,675	572,960		471,848
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		(301)		514	3,331		6,014
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		44,181	[1]	64,884	85,172	[1]	124,108
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales		(1,615)	[1]	(14,258)	(8,971)	[1]	(20,870)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		(63,751)	[1]	(6,318)	(67,873)	[1]	(12,633)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		0		5,666	9,055		11,614
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		580,510		556,160	580,510		556,160
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		(9,234)		0	(16,450)		29,280
Available-for-sale Securities [Member] | Asset-backed securities | Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		706		2,005	2,105		2,005
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		1,511		2,055	2,930		4,112
Available-for-sale Securities [Member] | Asset-backed securities | Investment Related Gains Losses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		283		942	356		1,247
Available-for-sale Securities [Member] | Asset-backed securities | Insurance Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0	0		0
Available-for-sale Securities [Member] | Asset-backed securities | Interest Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0	0		0
Available-for-sale Securities [Member] | Asset-backed securities | Policy Acquisition Costs And Other Insurance Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0	0		0
Available-for-sale Securities [Member] | Commercial Mortgage Backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		93,869		90,373	86,746		101,785
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		(386)		1,639	(696)		4,674
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		42	[1]	0	42	[1]	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales		(2,000)	[1]	0	(2,956)	[1]	(14,626)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		(893)	[1]	(263)	(6,013)	[1]	(542)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		0		5,712	12,828		5,712
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		77,819		97,914	77,819		97,914
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		(12,720)		0	(12,720)		0
Available-for-sale Securities [Member] | Commercial Mortgage Backed Securities [Member] | Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		640		447	1,229		875
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		677		447	1,271		819
Available-for-sale Securities [Member] | Commercial Mortgage Backed Securities [Member] | Investment Related Gains Losses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		(770)		6	(683)		92
Available-for-sale Securities [Member] | Commercial Mortgage Backed Securities [Member] | Insurance Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0	0		0
Available-for-sale Securities [Member] | Commercial Mortgage Backed Securities [Member] | Interest Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0	0		0
Available-for-sale Securities [Member] | Commercial Mortgage Backed Securities [Member] | Policy Acquisition Costs And Other Insurance Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0	0		0
Available-for-sale Securities [Member] | US Treasury And Government Member
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		27,756			28,529
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		(559)			(383)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	[1]	154			275
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	[1]	0			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	[1]	(94)			(1,038)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		0			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		27,359			27,359
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		0			0
Available-for-sale Securities [Member] | US Treasury And Government Member | Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		112			93
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		112			93
Available-for-sale Securities [Member] | US Treasury And Government Member | Investment Related Gains Losses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0			0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		(10)			(117)
Available-for-sale Securities [Member] | US Treasury And Government Member | Insurance Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0			0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0			0
Available-for-sale Securities [Member] | US Treasury And Government Member | Interest Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0			0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0			0
Available-for-sale Securities [Member] | US Treasury And Government Member | Policy Acquisition Costs And Other Insurance Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0			0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0			0
Available-for-sale Securities [Member] | US States and Political Subdivisions Debt Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		41,875		43,833	42,711		43,776
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		(1,480)		2,330	(1,455)		2,443
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		0	[1]	0	0	[1]	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales		0	[1]	0	0	[1]	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		(212)	[1]	(402)	(241)	[1]	(465)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		0		0	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		40,186		45,767	40,186		45,767
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		0		0	(835)		0
Available-for-sale Securities [Member] | US States and Political Subdivisions Debt Securities [Member] | Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		8		10	15		21
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		8		10	15		21
Available-for-sale Securities [Member] | US States and Political Subdivisions Debt Securities [Member] | Investment Related Gains Losses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		(5)		(4)	(9)		(8)
Available-for-sale Securities [Member] | US States and Political Subdivisions Debt Securities [Member] | Insurance Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0	0		0
Available-for-sale Securities [Member] | US States and Political Subdivisions Debt Securities [Member] | Interest Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0	0		0
Available-for-sale Securities [Member] | US States and Political Subdivisions Debt Securities [Member] | Policy Acquisition Costs And Other Insurance Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0	0		0
Available-for-sale Securities [Member] | Foreign Government Debt Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		15,202		11,157	19,663		37,997
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		(232)		33	(50)		33
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		0	[1]	0	0	[1]	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales		0	[1]	0	0	[1]	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		(313)	[1]	(302)	(623)	[1]	(599)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		0		0	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		14,657		10,888	14,657		10,888
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		0		0	(4,333)		26,543
Available-for-sale Securities [Member] | Foreign Government Debt Securities [Member] | Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0	0		0
Available-for-sale Securities [Member] | Foreign Government Debt Securities [Member] | Investment Related Gains Losses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0	0		0
Available-for-sale Securities [Member] | Foreign Government Debt Securities [Member] | Insurance Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0	0		0
Available-for-sale Securities [Member] | Foreign Government Debt Securities [Member] | Interest Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0	0		0
Available-for-sale Securities [Member] | Foreign Government Debt Securities [Member] | Policy Acquisition Costs And Other Insurance Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0	0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0	0		0
Available-for-sale Securities [Member] | Foreign Government Debt Securities [Member] | Other Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0			0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		$ 0			$ 0
Available-for-sale Securities [Member] | US Treasury And Government Member
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value				38,031			40,919
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)				572			877
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases				165			293
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales				0			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements				(5,534)			(8,563)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3				0			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value				32,994			32,994
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3				0			0
Available-for-sale Securities [Member] | US Treasury And Government Member | Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)				(185)			(282)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings				(185)			(282)
Available-for-sale Securities [Member] | US Treasury And Government Member | Investment Related Gains Losses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)				0			0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings				(55)			(250)
Available-for-sale Securities [Member] | US Treasury And Government Member | Insurance Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)				0			0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings				0			0
Available-for-sale Securities [Member] | US Treasury And Government Member | Interest Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)				0			0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings				0			0
Available-for-sale Securities [Member] | US Treasury And Government Member | Policy Acquisition Costs And Other Insurance Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)				0			0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings				$ 0			$ 0
[1]	The amount reported within purchases, sales and settlements is the purchase price (for purchases) and the sales/settlement proceeds (for sales and settlements) based upon the actual date purchased or sold/settled. Items purchased and sold/settled in the same period are excluded from the rollforward. The Company had no issuances during the period.

Fair Value of Assets and Liab71

Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Fair Value Assets Measured on Non-Recurring Basis) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Mortgage Loans on Real Estate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Assets Carrying Value Prior To Impairment	[1]			$ 5,850	$ 15,660
Fair Value Assets Gains Losses	[1]	$ (11)	$ (2,037)	39	(1,656)
Partnership Interest [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Assets Carrying Value Prior To Impairment	[2]			13,667	8,889
Fair Value Assets Gains Losses	[2]	$ 0	$ (4,171)	$ (4,509)	$ (4,171)
[1]	Mortgage loans — The impaired mortgage loans presented above were written down to their estimated fair values at the date the impairments were recognized and are reported as losses above. Subsequent improvements in estimated fair value on previously impaired loans recorded through a reduction in the previously established valuation allowance are reported as gains above. Nonrecurring fair value adjustments on mortgage loans are based on the fair value of underlying collateral or discounted cash flows.
[2]	Limited partnership interests — The impaired limited partnership interests presented above were accounted for using the cost method. Impairments on these cost method investments were recognized at estimated fair value determined using the net asset values of the Company’s ownership interest as provided in the financial statements of the investees. The market for these investments has limited activity and price transparency.

Fair Value of Assets and Liab72

Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Financial Instruments where Carrying Amounts and Fair Values May Differ) (Details) - USD ($) $ in Thousands		Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Assets
Mortgage loans on real estate (net of valuation allowances)		$ 3,073,313	$ 2,712,238
Policy loans		1,438,156	1,284,284
Funds withheld at interest		5,840,076	5,922,561
Cash and cash equivalents		1,335,661	1,645,669	$ 1,378,117	$ 923,647
Short-term investments		76,118	97,694
Other invested assets		1,110,107	1,198,319
Accrued investment income		322,069	261,096
Liabilities
Interest-sensitive contract liabilities		13,516,059	12,591,497
Long-term debt		2,313,470	2,314,293
Collateral finance and securitization notes		926,410	782,701
Reported Value Measurement [Member]
Assets
Mortgage loans on real estate (net of valuation allowances)		3,073,313	2,712,238
Policy loans		1,438,156	1,284,284
Funds withheld at interest	[1]	5,840,518	5,897,202
Cash and cash equivalents	[2]	670,624	745,823
Short-term investments	[2]	41,385	52,504
Other invested assets	[2]	374,351	465,720
Accrued investment income		322,069	261,096
Liabilities
Interest-sensitive contract liabilities	[1]	9,679,250	9,623,596
Long-term debt		2,313,470
Debt, Long-term and Short-term, Combined Amount			2,314,293
Collateral finance and securitization notes		926,410	782,701
Estimate of Fair Value Measurement [Member]
Assets
Mortgage loans on real estate (net of valuation allowances)		3,147,898	2,803,942
Policy loans		1,438,156	1,284,284
Funds withheld at interest	[1]	6,278,068	6,367,165
Cash and cash equivalents	[2]	670,624	745,823
Short-term investments	[2]	41,385	52,504
Other invested assets	[2]	424,186	518,261
Accrued investment income		322,069	261,096
Liabilities
Interest-sensitive contract liabilities	[1]	10,083,745	9,666,240
Long-term Debt, Fair Value		2,460,800
Debt, Long-term and Short-term, Combined Amount			2,518,399
Collateral finance and securitization notes		832,750	674,984
Estimate of Fair Value Measurement [Member] | Fair Value Inputs Level 1 Member
Assets
Mortgage loans on real estate (net of valuation allowances)		0	0
Policy loans		0	0
Funds withheld at interest	[1]	0	0
Cash and cash equivalents	[2]	670,624	745,823
Short-term investments	[2]	41,385	52,504
Other invested assets	[2]	4,916	4,674
Accrued investment income		0	0
Liabilities
Interest-sensitive contract liabilities	[1]	0	0
Long-term Debt, Fair Value		0
Debt, Long-term and Short-term, Combined Amount			0
Collateral finance and securitization notes		0	0
Estimate of Fair Value Measurement [Member] | Fair Value Inputs Level 2 Member
Assets
Mortgage loans on real estate (net of valuation allowances)		0	0
Policy loans		1,438,156	1,284,284
Funds withheld at interest	[1]	0	0
Cash and cash equivalents	[2]	0	0
Short-term investments	[2]	0	0
Other invested assets	[2]	35,006	35,446
Accrued investment income		322,069	261,096
Liabilities
Interest-sensitive contract liabilities	[1]	0	0
Long-term Debt, Fair Value		0
Debt, Long-term and Short-term, Combined Amount			0
Collateral finance and securitization notes		0	0
Estimate of Fair Value Measurement [Member] | Fair Value Inputs Level 3 Member
Assets
Mortgage loans on real estate (net of valuation allowances)		3,147,898	2,803,942
Policy loans		0	0
Funds withheld at interest	[1]	6,278,068	6,367,165
Cash and cash equivalents	[2]	0	0
Short-term investments	[2]	0	0
Other invested assets	[2]	384,264	478,141
Accrued investment income		0	0
Liabilities
Interest-sensitive contract liabilities	[1]	10,083,745	9,666,240
Long-term Debt, Fair Value		2,460,800
Debt, Long-term and Short-term, Combined Amount			2,518,399
Collateral finance and securitization notes		$ 832,750	$ 674,984
[1]	Carrying values presented herein differ from those presented in the condensed consolidated balance sheets because certain items within the respective financial statement caption are embedded derivatives and are measured at fair value on a recurring basis.
[2]	Carrying values presented herein differ from those presented in the condensed consolidated balance sheets because certain items within the respective financial statement caption are measured at fair value on a recurring basis.

Fair Value of Assets and Liab73

Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Narrative) (Details)	Jun. 30, 2015	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Percentage Of Fixed Maturity Securities Classified As Level 3	8.10%	8.80%

Segment Information (Total Reve

Segment Information (Total Revenues of Reportable Segments) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 2,630,340	$ 2,833,020	$ 5,150,953	$ 5,490,193
Americas [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	1,534,023	1,626,475	2,981,986	3,193,788
CANADA
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	281,548	309,113	558,426	586,862
EMEA [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	359,500	391,318	710,108	757,175
Asia Pacific [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	418,390	483,171	831,835	898,200
Corporate and Other [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	36,879	22,943	68,598	54,168
Life Insurance Product Line [Member] | Americas [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	1,342,248	1,333,027	2,597,538	2,611,719
Life Insurance Product Line [Member] | CANADA
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	270,090	301,401	535,094	572,845
Life Insurance Product Line [Member] | EMEA [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	284,192	307,100	579,424	614,850
Life Insurance Product Line [Member] | Asia Pacific [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	411,314	465,538	805,189	852,427
Nontraditional Long-Duration Contracts [Member] | Americas [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	191,775	293,448	384,448	582,069
Nontraditional Long-Duration Contracts [Member] | CANADA
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	11,458	7,712	23,332	14,017
Nontraditional Long-Duration Contracts [Member] | EMEA [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	75,308	84,218	130,684	142,325
Nontraditional Long-Duration Contracts [Member] | Asia Pacific [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 7,076	$ 17,633	$ 26,646	$ 45,773

Segment Information (Income Los

Segment Information (Income Loss Before Provision for Income Tax of Reportable Segments) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	$ 213,790	$ 300,535	$ 397,915	$ 499,975
Americas [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	153,186	189,462	225,534	323,558
CANADA
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	25,830	35,020	52,688	55,084
EMEA [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	40,591	61,322	70,707	76,527
Asia Pacific [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	2,910	34,928	65,703	61,239
Corporate and Other [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	(8,727)	(20,197)	(16,717)	(16,433)
Life Insurance Product Line [Member] | Americas [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	82,793	93,988	100,636	144,960
Life Insurance Product Line [Member] | CANADA
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	22,736	32,009	45,463	51,442
Life Insurance Product Line [Member] | EMEA [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	9,159	26,787	19,641	25,795
Life Insurance Product Line [Member] | Asia Pacific [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	4,315	28,213	56,963	47,080
Nontraditional Long-Duration Contracts [Member] | Americas [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	70,393	95,474	124,898	178,598
Nontraditional Long-Duration Contracts [Member] | CANADA
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	3,094	3,011	7,225	3,642
Nontraditional Long-Duration Contracts [Member] | EMEA [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	31,432	34,535	51,066	50,732
Nontraditional Long-Duration Contracts [Member] | Asia Pacific [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	$ (1,405)	$ 6,715	$ 8,740	$ 14,159

Segment Information (Total Asse

Segment Information (Total Assets of Reportable Segments) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 47,460,271	$ 44,679,611
Americas [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	29,758,824	25,732,075
CANADA
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	3,830,720	3,996,128
EMEA [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	4,650,948	4,693,322
Asia Pacific [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	3,622,467	3,619,368
Corporate and Other [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	5,597,312	6,638,718
Life Insurance Product Line [Member] | Americas [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	15,904,747	14,159,824
Life Insurance Product Line [Member] | CANADA
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	3,805,372	3,946,942
Life Insurance Product Line [Member] | EMEA [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	2,586,327	2,514,868
Life Insurance Product Line [Member] | Asia Pacific [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	2,997,342	2,951,723
Nontraditional Long-Duration Contracts [Member] | Americas [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	13,854,077	11,572,251
Nontraditional Long-Duration Contracts [Member] | CANADA
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	25,348	49,186
Nontraditional Long-Duration Contracts [Member] | EMEA [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	2,064,621	2,178,454
Nontraditional Long-Duration Contracts [Member] | Asia Pacific [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 625,125	$ 667,645

Commitments and Contingent Li77

Commitments and Contingent Liabilities Commitments and Contingent Liabilities (Commitments to Fund Investments) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Limited Partner [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	$ 240,386	$ 254,314
Commercial Loan [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	7,100	33,850
Private Placement [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	3,300	0
Bank Loans [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	52,467	52,859
Equity Release Mortgages [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	$ 8,383	$ 8,549

Commitments and Contingent Li78

Commitments and Contingent Liabilities (Credit Facility) (Details) - USD ($) $ in Thousands		6 Months Ended		12 Months Ended
		Jun. 30, 2015		Dec. 31, 2014
Credit Facility One Hundred Million [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 100,000
Maturity Date		June 2,017
Amount Utilized	[1]	$ 76,029		$ 81,747
Basis Of Fees		Fixed
Credit Facility Fifty Three Million [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[2]	$ 76,310
Maturity Date		November 2,015
Amount Utilized	[1]	$ 76,310		74,623
Basis Of Fees		Fixed
Credit Facility 270 Million [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 270,000
Maturity Date		November 2,017
Amount Utilized	[1]	$ 270,000		270,000
Basis Of Fees		Fixed
Credit Facility 120 Million [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 120,000
Maturity Date		May 2,016
Amount Utilized	[1]	$ 80,040		80,040
Basis Of Fees		Fixed
Credit Facility 850 Million [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 850,000
Maturity Date		September 2019
Amount Utilized		$ 401,856	[1]	204,774
Basis Of Fees		Senior unsecured long-term debt rating
Credit Facility One Hundred Fifty Million [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[2]	$ 38,535
Maturity Date		March 2,019
Amount Utilized	[1]	$ 51,892		80,961
Basis Of Fees		Fixed
Credit Facility One Hundred Fifty Million [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 150,000
Maturity Date		June 2,016
Amount Utilized	[1]	$ 130,000		130,000
Basis Of Fees		Fixed
Credit Facility Forty Seven Million [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[2]	$ 51,892
Maturity Date		May 2,016
Amount Utilized	[1]	$ 26,975		$ 28,612
Basis Of Fees		Fixed
[1]	Represents issued but undrawn letters of credit. There was no cash borrowed for the periods presented.
[2]	Foreign currency facility, amounts presented are in U.S. dollars.

Commitments and Contingent Li79

Commitments and Contingent Liabilities Commitments and Contingent Liabilities (Guarantees Issued) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Insurance Treaty Guarantee [Member]
Guarantor Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	$ 790,455	$ 826,496
Insurance Treaty Guarantee Net Of Assets Held In Trust [Member]
Guarantor Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	646,422	664,913
Guarantee Of Borrowed Securities [Member]
Guarantor Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	275,060	201,050
Product Financing Arrangement [Member]
Guarantor Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	100,000	100,000
Guarantee Of Lease Obligations [Member]
Guarantor Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	$ 5,245	$ 6,085

Commitments and Contingent Li80

Commitments and Contingent Liabilities Commitments and Contingent Liabilities (Maximum Potential Obligation) (Details) $ in Millions	Jun. 30, 2015USD ($)
Commitment Period Two Thousand Twenty Three [Member]
Other Commitments [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 500
Commitment Period Two Thousand Thirty Three [Member]
Other Commitments [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	950
Commitment Period Two Thousand Thirty Four [Member]
Other Commitments [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	3,000
Commitment Period Two Thousand Thirty Five [Member]
Other Commitments [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	500
Commitment Period Two Thousand Thirty Six [Member]
Other Commitments [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 1,432

Commitments and Contingent Li81

Commitments and Contingent Liabilities (Narrative) (Details) $ in Millions	Jun. 30, 2015USD ($)credit_facilities	Dec. 31, 2014USD ($)
Commitments And Contingent Liabilities [Line Items]
Undrawn outstanding letters of credit in favor of third parties	$ 147.2	$ 176.5
Undrawn outstanding letters of credit between subsidiaries	$ 1,159.5	$ 1,035
Number of credit facilities | credit_facilities	8
Credit Facility 850 Million [Member]
Commitments And Contingent Liabilities [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 850
Letter of Credit [Member]
Commitments And Contingent Liabilities [Line Items]
Number of credit facilities | credit_facilities	7
Line of Credit Facility, Maximum Borrowing Capacity	$ 806.7

Income Tax Income Tax (Provisio

Income Tax Income Tax (Provision for Income Tax Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	$ 74,826	$ 105,187	$ 139,270	$ 174,991
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount	(764)	(4,676)	(6,285)	(7,896)
Income Tax Reconciliation Foreign Income Tax Basis Differential	(6,931)	(3,564)	(13,601)	(3,314)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	4,967	2,510	11,758	(647)
Effective Income Tax Rate Reconciliation, Tax Contingency, Domestic, Amount	952	778	1,905	1,556
Income Tax Reconciliation SubpartF	11,452	3,691	17,886	6,129
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount	(1,104)	(1,155)	(3,448)	(2,010)
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount	(212)	114	(4,977)	(3,237)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	213	(646)	(98)	(557)
Income Tax Expense (Benefit)	$ 83,399	$ 102,239	$ 142,410	$ 165,015
Effective Income Tax Rate Reconciliation, Percent	39.00%	34.00%	35.80%	33.00%

Employee Benefit Plans (Defined

Employee Benefit Plans (Defined Benefit Plans Disclosure) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2,586	$ 2,489	$ 4,616	$ 3,990
Interest cost	1,283	1,487	2,526	2,295
Expected return on plan assets	(1,331)	(1,302)	(2,449)	(2,235)
Amortization of prior service cost	80	216	163	218
Amortization of prior actuarial loss	833	245	1,272	918
Total	3,451	3,135	6,128	5,186
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	589	470	1,178	940
Interest cost	491	339	982	677
Expected return on plan assets	0	0	0	0
Amortization of prior service cost	0	0	0	0
Amortization of prior actuarial loss	265	217	530	434
Total	$ 1,345	$ 1,026	$ 2,690	$ 2,051

Employee Benefit Plans (Narrati

Employee Benefit Plans (Narrative) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2015USD ($)
Compensation and Retirement Disclosure [Abstract]
Defined Benefit Plan, Contributions by Employer	$ 4,000
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year	$ 0

Equity Based Compensation (Narr

Equity Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Equity compensation expense	$ 3.1	$ 6.4
Stock appreciation rights granted	300,000
Stock appreciation rights granted, weighted average exercise price (per share)	$ 90.06
Performance contingent units	200,000
Shares Granted To Non Employee Directors	15,174
Options exercisable (shares)	1,800,000
Options exercisable, weighted average price (per share)	$ 53.26
Options, remaining term	4 years 11 months
Compensation cost not yet recognized	$ 36.6
Period for recognition	2 years 1 month

Retrocession Arrangements and86

Retrocession Arrangements and Reinsurance Ceded Receivables Retrocession Arrangements and Reinsurance Ceded Receivables (Ceded Reinsurance Receivable Assets) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Ceded Credit Risk [Line Items]
Reinsurance ceded receivables	$ 711,463	$ 578,206
Reinsurance Recoverables, Percentage of Total	100.00%	100.00%
Other Reinsurers [Member]
Ceded Credit Risk [Line Items]
Reinsurance ceded receivables	$ 153,963	$ 160,285
Reinsurance Recoverables, Percentage of Total	21.60%	27.60%
AM Best, A+ Rating [Member] | Reinsurer A [Member]
Ceded Credit Risk [Line Items]
Reinsurance ceded receivables	$ 201,915	$ 210,996
Reinsurance Recoverables, Percentage of Total	28.40%	36.50%
AM Best, A+ Rating [Member] | Reinsurer B [Member]
Ceded Credit Risk [Line Items]
Reinsurance ceded receivables	$ 193,294	$ 45,541
Reinsurance Recoverables, Percentage of Total	27.20%	7.90%
AM Best, A+ Rating [Member] | Reinsurer C [Member]
Ceded Credit Risk [Line Items]
Reinsurance ceded receivables	$ 73,148	$ 74,412
Reinsurance Recoverables, Percentage of Total	10.30%	12.90%
AM Best, A Rating [Member] | Reinsurer E [Member]
Ceded Credit Risk [Line Items]
Reinsurance ceded receivables	$ 45,464	$ 43,818
Reinsurance Recoverables, Percentage of Total	6.40%	7.60%
AM Best, A++ Rating [Member] | Reinsurer D [Member]
Ceded Credit Risk [Line Items]
Reinsurance ceded receivables	$ 43,679	$ 43,154
Reinsurance Recoverables, Percentage of Total	6.10%	7.50%

Retrocession Arrangements and87

Retrocession Arrangements and Reinsurance Ceded Receivables (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Ceded Credit Risk [Line Items]
Reinsurance Claims Recoverables	$ 260.1	$ 143
Claims Recoverable From Retrocessionaires Past Due	$ 19.6	$ 10.9
AM Best, A- Rating [Member]
Ceded Credit Risk [Line Items]
Ceded Credit Risk, Disclosure	“A- (excellent)”	“A- (excellent)”

Stock Transactions Stock Transa

Stock Transactions Stock Transactions (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Jul. 31, 2015
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Shares, Acquired	252,642	2,538,718
Treasury Stock, Value, Acquired, Cost Method	$ 23.5	$ 230.1
Stock Repurchase Program, Authorized Amount	450	$ 300	$ 150
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 46.4

Acquisition (Narrative) (Detail

Acquisition (Narrative) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Supplemental Cash Flow Elements [Abstract]
Payments to Acquire Businesses, Gross	$ (191,450)
Noncash or Part Noncash Acquisition, Value of Assets Acquired	3,681,699	$ 0
Noncash or Part Noncash Acquisition, Investments Acquired	3,600,000
Noncash or Part Noncash Acquisition, Value of Liabilities Assumed	$ 3,490,249	$ 0

Financing Activities (Narrative

Financing Activities (Narrative) (Details) $ in Millions	Jun. 30, 2015USD ($)
Financing Activities [Abstract]
Collateralized Financings	$ 160.6